Add Claude Sonnet 4.5 model support

[PeterDaveHello]

User description

• Register claudeSonnet45Api with the Anthropic API list using the claude-sonnet-4-5-20250929 identifier.
• Add OpenRouter (anthropic/claude-sonnet-4.5) and AIML (anthropic/claude-sonnet-4-5) options to keep providers in sync.
• Update the default OpenRouter model to Sonnet 4.5 so new installs use the latest Claude Sonnet model.

Reference:

• https://www.anthropic.com/news/claude-sonnet-4-5

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PR Type

Enhancement

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Description

• Add Claude Sonnet 4.5 model support across providers

• Register new model with Anthropic API configuration

• Update default OpenRouter model to latest version

• Maintain provider synchronization for new model

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Diagram Walkthrough

flowchart LR
  A["Claude Sonnet 4.5 Model"] --> B["Anthropic API"]
  A --> C["OpenRouter Provider"]
  A --> D["AIML Provider"]
  E["Default Configuration"] --> C

Loading

File Walkthrough

	Relevant files
Enhancement	index.mjs Add Claude Sonnet 4.5 model configurations                              src/config/index.mjs Add claudeSonnet45Api to Anthropic API model keys Register new model configurations for all three providers Update default OpenRouter model to Sonnet 4.5 Add model definitions with proper identifiers and descriptions +16/-1

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Summary by CodeRabbit

• New Features
  • Added support for Claude Sonnet 4.5 across providers, including Anthropic, OpenRouter, and AIML. Users can now select this model in presets.
• Chores
  • Updated the default active model to the Claude Sonnet 4.5 variant via OpenRouter for improved quality and consistency. Users may notice upgraded responses without changing settings.

[coderabbitai]

Walkthrough

Adds Claude Sonnet 4.5 across configuration: new model keys for Claude API, OpenRouter, and AIML; registers three corresponding Models entries; updates defaultConfig activeApiModes to use the OpenRouter Claude Sonnet 4.5 model.

Changes

Cohort / File(s)	Summary
API model keys src/config/index.mjs	Added claudeSonnet45Api to claudeApiModelKeys; added openRouter_anthropic_claude_sonnet4_5 to openRouterApiModelKeys; added aiml_anthropic_claude_sonnet_4_5 to aimlApiModelKeys.
Models registry entries src/config/index.mjs	Added Models: claudeSonnet45Api, openRouter_anthropic_claude_sonnet4_5, aiml_anthropic_claude_sonnet_4_5 with values and descriptions.
Default configuration src/config/index.mjs	In defaultConfig.activeApiModes, replaced openRouter_anthropic_claude_sonnet4 with openRouter_anthropic_claude_sonnet4_5.

Sequence Diagram(s)

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• Add Claude 3.7 Sonnet & Sonnet/Opus 4 #861 — Similar update to add new Claude model keys and Models entries in src/config/index.mjs.
• Add OpenAI's gpt-5-chat-latest non-reasoning model #875 — Adds API model keys and Models mappings following the same pattern in src/config/index.mjs.
• Add Anthropic Claude Opus 4.1 #873 — Parallel change introducing a new Claude model (Opus 4.1) with matching edits in src/config/index.mjs.

Suggested labels

Review effort 2/5

Poem

A nibble of config, a hop to Four-Point-Five,
New keys in the meadow, fresh models arrive.
I twitch my whiskers—defaults realign,
Sonnet sings sweeter in OpenRouter’s line.
Carrot-shaped commits, concise and alive!
— Your codey cottontail 🥕🐇

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title Check	✅ Passed	The pull request title "Add Claude Sonnet 4.5 model support" accurately and concisely describes the main change in the changeset. The changes involve adding support for the new Claude Sonnet 4.5 model across multiple API providers (Claude API, OpenRouter, and AIML) by introducing new model keys, registering the models in the Models registry, and updating the default configuration to use the new model. The title is clear, specific, and directly reflects the primary objective of the pull request, which is to integrate the newly released Claude Sonnet 4.5 model into the application's configuration system. The title avoids unnecessary details while providing enough information for teammates to understand the nature of the change.
Docstring Coverage	✅ Passed	No functions found in the changes. Docstring coverage check skipped.

✨ Finishing touches

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🧪 Generate unit tests

• Create PR with unit tests
• Post copyable unit tests in a comment

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[gemini-code-assist]

Summary of Changes

Hello @PeterDaveHello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces comprehensive support for the newly released Claude Sonnet 4.5 model. It involves registering the model within the application's configuration, extending its availability to third-party API providers like OpenRouter and AIML, and setting it as the default OpenRouter model for new users to ensure they benefit from the latest advancements.

Highlights

• New Model Support: Added support for the new Claude Sonnet 4.5 model, registering it with the Anthropic API list using the identifier "claude-sonnet-4-5-20250929".
• Third-Party Provider Integration: Integrated Claude Sonnet 4.5 support for OpenRouter and AIML platforms, ensuring consistency across providers.
• Default Model Update: Updated the default OpenRouter model to Claude Sonnet 4.5, ensuring that new installations utilize the latest Claude Sonnet offering.

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[Copilot]

Pull Request Overview

This PR adds support for the newly released Claude Sonnet 4.5 model across multiple AI providers. The change ensures users can access the latest Claude model through direct Anthropic API, OpenRouter, and AIML providers.

• Registers the new claudeSonnet45Api model with identifier claude-sonnet-4-5-20250929
• Adds Claude Sonnet 4.5 support for OpenRouter and AIML providers
• Updates the default OpenRouter model from Sonnet 4 to Sonnet 4.5

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[qodo-merge-pro]

PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

⏱️ Estimated effort to review: 2 🔵🔵⚪⚪⚪

🧪 No relevant tests

🔒 No security concerns identified

⚡ Recommended focus areas for review Consistency Ensure the newly added claudeSonnet45Api key is referenced wherever claudeSonnet4Api is used (e.g., selectors, validation schemas, feature flags), so the model is selectable and not orphaned. export const claudeApiModelKeys = [ 'claude12Api', 'claude2Api', 'claude21Api', 'claude3HaikuApi', 'claude3SonnetApi', 'claude3OpusApi', 'claude35SonnetApi', 'claude35HaikuApi', 'claude37SonnetApi', 'claudeOpus4Api', 'claudeOpus41Api', 'claudeSonnet4Api', 'claudeSonnet45Api', ] Default Change Impact Switching the default OpenRouter active mode from Sonnet 4 to 4.5 may affect users lacking access/quotas; confirm fallback behavior and migration notes are in release docs. // If it were directly written into customApiModes, the value would become fixed, even if the user has not made any customizations. activeApiModes: [ 'chatgptFree35', 'claude2WebFree', 'moonshotWebFree', 'ollamaModel', 'customModel', 'azureOpenAi', 'openRouter_anthropic_claude_sonnet4_5', 'openRouter_google_gemini_2_5_pro', 'openRouter_openai_o3', ], Identifier Accuracy Verify the Anthropic API identifier claude-sonnet-4-5-20250929 and provider slugs match upstream naming; mismatches will break requests. claudeOpus41Api: { value: 'claude-opus-4-1-20250805', desc: 'Claude.ai (API, Claude Opus 4.1)', }, claudeSonnet4Api: { value: 'claude-sonnet-4-20250514', desc: 'Claude.ai (API, Claude Sonnet 4)', }, claudeSonnet45Api: { value: 'claude-sonnet-4-5-20250929', desc: 'Claude.ai (API, Claude Sonnet 4.5)', },

[qodo-merge-pro]

PR Code Suggestions ✨

Explore these optional code suggestions:

Category	Suggestion	Impact
Possible issue	Standardize model identifier format Verify the openRouter_anthropic_claude_sonnet4_5 model identifier anthropic/claude-sonnet-4.5 against OpenRouter's documentation to ensure the format is correct. src/config/index.mjs [382-385] openRouter_anthropic_claude_sonnet4_5: { - value: 'anthropic/claude-sonnet-4.5', + value: 'anthropic/claude-sonnet-4-5', desc: 'OpenRouter (Claude Sonnet 4.5)', }, Apply / Chat Suggestion importance[1-10]: 6 __ Why: The suggestion correctly identifies that the model identifier string must be exact for the API to work and encourages verification, which is a valid and helpful check for this type of configuration change.	Low
	Verify provider-specific model identifier Verify the aiml_anthropic_claude_sonnet_4_5 model identifier anthropic/claude-sonnet-4-5 against AIML's documentation to prevent potential API failures. src/config/index.mjs [423-426] aiml_anthropic_claude_sonnet_4_5: { - value: 'anthropic/claude-sonnet-4-5', + value: 'claude-sonnet-4-5', desc: 'AIML (Claude Sonnet 4.5)', }, Apply / Chat Suggestion importance[1-10]: 6 __ Why: The suggestion correctly points out the critical need for the model identifier to be exact for the API to function and rightly encourages verification with the provider's documentation.	Low
More

[gemini-code-assist]

Code Review

This pull request adds support for the Claude Sonnet 4.5 model by registering it with the Anthropic API list and updating the OpenRouter and AIML options. The default OpenRouter model is also updated to Sonnet 4.5. The changes involve modifying the src/config/index.mjs file to include the new model in various lists and configurations.

[coderabbitai]

Actionable comments posted: 2

📜 Review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 1eb1dc3 and 52dc234.

📒 Files selected for processing (1)

• src/config/index.mjs (7 hunks)

🧰 Additional context used

📓 Path-based instructions (2)

**/*.{js,jsx,mjs}

📄 CodeRabbit inference engine (AGENTS.md)

Follow ESLint React/JSX standards defined in .eslintrc.json (run npm run lint)

Files:

• src/config/index.mjs

src/config/index.mjs

📄 CodeRabbit inference engine (AGENTS.md)

Configuration management entry should be maintained in src/config/index.mjs

Files:

• src/config/index.mjs

🔇 Additional comments (5)

src/config/index.mjs (5)

85-85: LGTM!

The addition of claudeSonnet45Api to the claudeApiModelKeys array follows the existing naming convention and is properly placed.

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114-114: LGTM!

The addition follows the established naming convention for OpenRouter models.

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125-125: LGTM!

The addition to aimlApiModelKeys is properly positioned and follows the naming convention.

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556-556: LGTM!

Updating the default OpenRouter model to Claude Sonnet 4.5 is appropriate, ensuring new installations use the latest model. This change only affects new users, as existing configurations are preserved.

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423-426: Verify the model identifier with AIML's API.

The identifier anthropic/claude-sonnet-4-5 follows the established naming pattern for AIML models in this codebase (e.g., anthropic/claude-sonnet-4, anthropic/claude-opus-4-1). However, web searches only confirm AIML supports "Claude Sonnet 4"—no explicit documentation for a "4.5" variant was found. Please confirm that anthropic/claude-sonnet-4-5 is available in AIML's model database before merging.