Backport anthropic models

[toyamarinyon]

User description

Summary

Backports the latest Anthropic model, Claude Opus 4.5, from language-model-registry to language-model, enabling its use in classic text-generation nodes and the UI.

Related Issue

Referenced #2391 for context on adding Anthropic models.

Changes

• packages/language-model: Defined claude-opus-4.5 model, pricing, and parsing logic, including fallbacks for various aliases.
• packages/node-registry: Updated model conversion helpers and added tests to correctly map claude-opus-4.5 between node formats without downgrading.
• internal-packages/workflow-designer-ui: Added claude-opus-4.5 to the recommended Anthropic model list for pro users in the UI.

Testing

• New and existing unit tests for model parsing and node conversion (including round-tripping) pass.
• Local pnpm install, pnpm format, pnpm build-sdk, pnpm check-types, pnpm tidy, and pnpm test commands all succeeded.

Other Information

This implementation focuses on the minimal changes required to integrate the new model, avoiding deeper structural or design changes as per the task instructions.

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PR Type

Enhancement

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Description

• Add Claude Opus 4.5 model support across language model packages

• Implement model ID parsing with fallback logic for various aliases

• Update pricing information for Claude Opus 4.5 model

• Add comprehensive unit tests for model conversion and round-trip validation

• Include Claude Opus 4.5 in UI toolbar for pro users

---

Diagram Walkthrough

flowchart LR
  A["Claude Opus 4.5<br/>Model Definition"] -->|"Pricing & Config"| B["Language Model<br/>Registry"]
  B -->|"Model Conversion"| C["Node Registry<br/>Conversion Logic"]
  C -->|"UI Integration"| D["Workflow Designer<br/>Toolbar"]
  E["Model ID Parsing<br/>with Fallbacks"] -->|"Validates"| B
  F["Unit Tests"] -->|"Verify"| C

Loading

File Walkthrough

	Relevant files
Enhancement	anthropic.ts Add Claude Opus 4.5 model definition and parsing                  packages/language-model/src/anthropic.ts Added claude-opus-4.5 to the enum of supported Anthropic model IDs Implemented fallback parsing logic for multiple model ID aliases (claude-opus-4-5-*, claude-4-5-opus-*, claude-4.5-opus-*) Created claude45Opus model definition with TextGeneration, Reasoning, and file input capabilities Updated models export array to include the new Claude Opus 4.5 model +25/-1    toolbar.tsx Add Claude Opus 4.5 to UI toolbar                                                internal-packages/workflow-designer-ui/src/editor/tool/toolbar/toolbar.tsx Added claude-opus-4.5 to the list of available Anthropic models for pro users Positioned between Sonnet and Opus 4.1 models in the toolbar Maintains separate model lists for free and pro tier users +5/-1
Tests	anthropic.test.ts Add model ID parsing tests for Claude Opus 4.5                      packages/language-model/src/anthropic.test.ts Added test case for parsing valid claude-opus-4.5 enum value Added three new fallback parsing test cases for various Claude Opus 4.5 alias formats Tests verify correct fallback behavior for claude-opus-4-5-*, claude-4-5-opus-*, and claude-4.5-opus-* patterns +21/-0    nodes.ts Add Claude Opus 4.5 test fixture node                                        packages/node-registry/src/fixtures/node-conversion/nodes.ts Created anthropicClaudeOpus45 fixture node with Claude Opus 4.5 model configuration Configured with TextGeneration type, reasoning enabled, and sample prompt Includes proper LLM provider and model ID settings for testing +28/-0    node-conversion.test.ts Add Claude Opus 4.5 node conversion tests                                packages/node-registry/src/node-conversion.test.ts Added import for anthropicClaudeOpus45 fixture Added test case for converting Claude Opus 4.5 from TextGeneration to ContentGeneration format Added test case for converting Claude Opus 4.5 back from ContentGeneration to TextGeneration format Added round-trip conversion test to verify data preservation through bidirectional conversion +38/-0
Configuration changes	model-prices.ts Add Claude Opus 4.5 pricing information                                    packages/language-model/src/costs/model-prices.ts Added pricing configuration for claude-opus-4.5 model Set input cost at 5.0 per mega token and output cost at 25.0 per mega token Pricing valid from March 31, 2025 +15/-0
Bug fix	node-conversion.ts Fix Claude Opus 4.5 model conversion mapping                          packages/node-registry/src/node-conversion.ts Added case for claude-opus-4.5 in TextGeneration to ContentGeneration conversion mapping Fixed conversion logic to return claude-opus-4.5 instead of downgrading to claude-opus-4-1-20250805 Ensures proper round-trip conversion without model downgrading +3/-2

---

Summary by CodeRabbit

• New Features

  • Claude Opus 4.5 is available in pro-tier workflows with text generation, reasoning, and PDF/image file input support.
  • Pricing for Claude Opus 4.5 has been added.

• Tests

  • Added parsing/fallback tests and conversion/round‑trip tests covering Claude Opus 4.5.

• Chores

  • Updated sample fixture and node conversion mappings to include Claude Opus 4.5.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

---

Note

Adds Anthropic claude-opus-4.5 across model registry, pricing, node conversions, and UI, with robust ID parsing and tests.

• Language Model
  • Add claude-opus-4.5 to AnthropicLanguageModelId with alias fallbacks and defaulting.
  • Define model entry (capabilities, tier) and include in exported models.
  • Add pricing for claude-opus-4.5 in packages/language-model/src/costs/model-prices.ts.
• Node Registry
  • Map claude-opus-4.5 in both conversion directions without downgrading; add fixture node.
• UI
  • Surface claude-opus-4.5 in pro-tier Anthropic recommendations in internal-packages/workflow-designer-ui/src/editor/tool/toolbar/toolbar.tsx.
• Tests
  • Extend parsing tests for AnthropicLanguageModelId fallbacks.
  • Add conversion and round-trip tests for claude-opus-4.5.

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[coderabbitai]

Walkthrough

Adds support for Anthropic Claude Opus 4.5: model definition, pricing, parsing/fallback handling, UI inclusion in the toolbar for non-free users, node registry mappings and fixtures, and tests covering parsing and node-conversion round-trips.

Changes

Cohort / File(s)	Summary
Model Definition & Configuration packages/language-model/src/anthropic.ts, packages/language-model/src/anthropic.test.ts, packages/language-model/src/costs/model-prices.ts	Adds claude-opus-4.5 to the AnthropicLanguageModelId enum and parsing fallbacks, adds public model claude45Opus with TextGeneration, Reasoning, PdfFileInput, ImageFileInput capabilities at pro tier, adds pricing entry for claude-opus-4.5 (input: 5.0, output: 25.0 per megatoken, validFrom 2025-11-25T00:00:00Z), and introduces tests for direct and fallback parsing to claude-opus-4.5 plus default mapping cases.
UI Integration internal-packages/workflow-designer-ui/src/editor/tool/toolbar/toolbar.tsx	Extends the Anthropic models list shown to non-free-tier users to include "claude-opus-4.5" alongside existing Anthropic models.
Node Registry & Conversion packages/node-registry/src/__fixtures__/node-conversion/nodes.ts, packages/node-registry/src/node-conversion.ts, packages/node-registry/src/node-conversion.test.ts	Adds anthropicClaudeOpus45 fixture and test cases for TextGeneration ↔ ContentGeneration conversions and round-trips for Opus 4.5; updates conversion mapping so "claude-opus-4.5" ↔ "anthropic/claude-opus-4.5" and adjusts googleGemini fixture outputs (changed first output id and added a Source output).

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

• Attention areas:
  • Verify the new regex parsing branches for claude-opus-4.5 handle intended variants and do not overlap unintended patterns.
  • Confirm pricing entry fields and validFrom timestamp are correct and consistent with other entries.
  • Ensure node-conversion mappings are symmetric and existing conversions (e.g., opus 4-1) remain unaffected.
  • Review updated tests for adequate coverage and any brittle assumptions about model ordering.

Poem

🐰 A new model hops into sight,
Opus 4.5, wiggle-wiggle—delight!
Tests snug in burrows, pricing in place,
Toolbar opens, nodes fall in place.
Hooray, little rabbit, for this fresh embrace.

Pre-merge checks and finishing touches

❌ Failed checks (1 warning, 1 inconclusive)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	You can run @coderabbitai generate docstrings to improve docstring coverage.
Title check	❓ Inconclusive	The title 'Backport anthropic models' is vague and overly generic. It doesn't clearly specify which model(s) are being added or highlight the primary change (adding Claude Opus 4.5 support).	Consider a more specific title like 'Add Claude Opus 4.5 model support' or 'Backport Claude Opus 4.5 from language-model-registry' to better communicate the specific change.

✅ Passed checks (1 passed)

Check name	Status	Explanation
Description check	✅ Passed	The pull request description comprehensively covers all required template sections (Summary, Related Issue, Changes, Testing, Other Information) with detailed information about the implementation.

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Reviewing files that changed from the base of the PR and between 05ea76d and d51a467.

📒 Files selected for processing (1)

• packages/language-model/src/costs/model-prices.ts (1 hunks)

🚧 Files skipped from review as they are similar to previous changes (1)

• packages/language-model/src/costs/model-prices.ts

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[Copilot]

Pull request overview

This PR backports Claude Opus 4.5 from the language-model-registry to the language-model package, enabling its use in classic text-generation nodes and the UI. The key changes include adding the model definition with pricing, implementing fallback parsing logic for various model name aliases, and updating the UI to display it as a recommended option for pro users.

Key Changes:

• Added claude-opus-4.5 model definition with capabilities, tier restrictions, and pricing ($5/$25 per mega-token for input/output)
• Implemented bidirectional conversion between text-generation and content-generation node formats to prevent model downgrading
• Updated UI to include the new model in the recommended Anthropic models list for pro users

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/language-model/src/anthropic.ts	Added model definition, fallback regex patterns for aliases, and exported the model in the models array
packages/language-model/src/costs/model-prices.ts	Defined pricing structure with effective date of March 31, 2025
packages/language-model/src/anthropic.test.ts	Added test cases for parsing the new model ID and its various alias patterns
packages/node-registry/src/node-conversion.ts	Updated conversion helpers to correctly map claude-opus-4.5 bidirectionally without downgrading
packages/node-registry/src/node-conversion.test.ts	Added test cases for model conversion and round-trip preservation
packages/node-registry/src/__fixtures__/node-conversion/nodes.ts	Created fixture data for the new model with sample configuration
internal-packages/workflow-designer-ui/src/editor/tool/toolbar/toolbar.tsx	Added the model to the recommended list for pro users in the UI

---

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PR Compliance Guide 🔍

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🟢	No security concerns identified No security vulnerabilities detected by AI analysis. Human verification advised for critical code.
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PR Code Suggestions ✨

Explore these optional code suggestions:

Category	Suggestion	Impact
High-level	Centralize model definitions to simplify maintenance The current method of adding a new model involves modifying numerous files across various packages. To improve maintainability and reduce errors, it's suggested to consolidate all model-related configurations into a single, centralized registry. Examples: packages/language-model/src/anthropic.ts [23-135] "claude-opus-4.5", "claude-opus-4-1-20250805", "claude-sonnet-4-5-20250929", "claude-haiku-4-5-20251001", ]) .catch((ctx) => { if (typeof ctx.value !== "string") { return "claude-haiku-4-5-20251001"; } const v = ctx.value; ... (clipped 103 lines) packages/node-registry/src/node-conversion.ts [22-65] case "claude-opus-4.5": return "anthropic/claude-opus-4.5"; case "claude-opus-4-1-20250805": return "anthropic/claude-opus-4.1"; case "claude-sonnet-4-5-20250929": return "anthropic/claude-sonnet-4-5"; case "gemini-2.5-flash": return "google/gemini-2.5-flash"; case "gemini-2.5-flash-lite": return "google/gemini-2.5-flash-lite"; ... (clipped 34 lines) Solution Walkthrough: Before: // packages/language-model/src/anthropic.ts export const AnthropicLanguageModelId = z.enum([...]); // Add new model ID const newModel = { ... }; // Define new model object export const models = [newModel, ...]; // Add to export list // packages/language-model/src/costs/model-prices.ts export const anthropicTokenPricing: ModelPriceTable = { "new-model-id": { prices: [...] }, // Add pricing ... }; // packages/node-registry/src/node-conversion.ts function convertTextGenerationLanguageModelIdToContentGenerationLanguageModelId(...) { switch (from) { /* Add case for new model */ } } function convertContentGenerationLanguageModelIdToTextGenerationLanguageModelId(...) { switch (from) { /* Add case for new model */ } } // internal-packages/workflow-designer-ui/src/editor/tool/toolbar/toolbar.tsx const anthropicModels = getAvailableModels( isFreeUser ? [...] : ["...", "new-model-id"], // Add to UI list ... ); After: // packages/model-registry/src/registry.ts (hypothetical) export const MODELS = { "claude-opus-4.5": { provider: "anthropic", tier: "pro", ui: { recommended: true }, pricing: { input: 5.0, output: 25.0, /* ... */ }, capabilities: [Capability.TextGeneration, /* ... */], ids: { legacy: "claude-opus-4.5", contentGen: "anthropic/claude-opus-4.5", }, aliases: [/^claude-opus-4[.-]5(?:-.+)?$/, /^claude-4[.-]5-opus-/], }, // ... other models }; // Other files would then consume this registry dynamically, // eliminating the need for manual updates in multiple places. // e.g., UI code: const proModels = Object.values(MODELS).filter(m => m.provider === 'anthropic' && m.tier === 'pro'); Suggestion importance[1-10]: 8 __ Why: This is a significant architectural suggestion that correctly identifies a maintainability issue, as adding a new model requires modifying multiple, scattered files, which is error-prone.	Medium
General	Refine regex for stricter model fallback Refine the regular expression for model ID fallback to be stricter. Change the regex to require a suffix, ensuring it only matches aliases and not the canonical model ID, which prevents masking potential configuration errors. packages/language-model/src/anthropic.ts [33-35] - if (/^claude-opus-4[.-]5(?:-.+)?$/.test(v)) { + if (/^claude-opus-4[.-]5-/.test(v)) { return "claude-opus-4.5"; } Apply / Chat Suggestion importance[1-10]: 6 __ Why: The suggestion correctly points out that the regex is too permissive and could mask a configuration error. Tightening the regex improves the code's robustness and makes the validation logic more explicit.	Low
Update

[giselles-ai]

🔍 QA Testing Assistant by Giselle

📋 Manual QA Checklist

Based on the changes in this PR, here are the key areas to test manually:

• Verify Model Availability (Pro User): Log in as a "pro" user, create a new workflow, add a "Text Generation" node, and confirm claude-opus-4.5 is listed in the model selection dropdown.
• Verify Model Absence (Free User): Log in as a "free" user, create a new workflow, add a "Text Generation" node, and confirm claude-opus-4.5 is not listed in the model selection dropdown.
• Execute Generation with New Model: Using a "pro" user, select claude-opus-4.5 in a "Text Generation" node, provide a prompt, and verify successful execution with expected output.
• Verify Save and Reload Persistence: Create a workflow with claude-opus-4.5 selected, save it, close and re-open the workflow, and confirm claude-opus-4.5 remains the selected model.
• Verify Cost Calculation (if applicable): If cost estimation is available, run a generation with claude-opus-4.5 and check that the cost reflects the new pricing schema ($5/M input, $25/M output).

✨ Prompt for AI Agents

Use the following prompts with Cursor or Claude Code to automate E2E testing:

📝 E2E Test Generation Prompt

You are an expert QA engineer tasked with writing E2E tests using Playwright and TypeScript for a new feature adding the `claude-opus-4.5` Anthropic model.

**Context:**
This PR integrates the `claude-opus-4.5` model into the application's workflow designer. It should be available to "pro" users in "Text Generation" nodes but hidden from "free" users. The model selection must persist after saving and reloading workflows.

**Test Scenarios to Implement:**

1.  **Pro User Model Visibility and Selection:**
    *   Log in as a "pro" user.
    *   Create a new workflow.
    *   Add a "Text Generation" node.
    *   Open the node's settings.
    *   Assert that "Claude Opus 4.5" is visible in the model dropdown.
    *   Select "Claude Opus 4.5".
    *   Assert that the dropdown now displays "Claude Opus 4.5".

2.  **Model Selection Persistence:**
    *   Log in as a "pro" user.
    *   Create a workflow with a "Text Generation" node, selecting "Claude Opus 4.5".
    *   Save the workflow.
    *   Reload the page.
    *   Re-open the workflow.
    *   Select the "Text Generation" node and assert that "Claude Opus 4.5" is still the selected model.

3.  **Free User Model Invisibility:**
    *   Log in as a "free" user.
    *   Create a new workflow.
    *   Add a "Text Generation" node.
    *   Open the node's settings.
    *   Assert that "Claude Opus 4.5" is **not visible** in the model dropdown.

**Implementation Details:**
*   Use `data-testid` attributes for selectors (e.g., `llm-selector-trigger`, `model-option-claude-opus-4.5`).
*   Utilize helper functions like `loginAs(page, 'pro')` and `createNewWorkflow(page)`.
*   Employ `expect` assertions for visibility (`toBeVisible`, `not.toBeVisible`) and text content (`toHaveText`).
*   Structure tests within a `test.describe('Anthropic Model: Claude Opus 4.5', ...)` block.
*   Ensure each test is independent and sets up its own state using `test.beforeEach` if necessary.
*   Target test file: `e2e/tests/workflow-designer/anthropic-models.spec.ts`.

**MCP Integration:**
Tests should be runnable via `mcp playwright:test --test-file=e2e/tests/workflow-designer/anthropic-models.spec.ts`.

---

[shige]

Thank you! 🆕

[shige]

✅ https://claude.com/pricing#api

[cursor]

Bug: Incorrect pricing valid date for Claude Opus 4.5

The validFrom date for claude-opus-4.5 pricing is set to "2025-11-25T00:00:00Z" (November 25, 2025), but Claude Opus 4.5 was officially released on November 24, 2025 according to Anthropic's announcement. This off-by-one date discrepancy could cause pricing lookups to fail for usage on the release day, since getValidPricing filters by new Date(price.validFrom) <= now.