Add support for 2026 AI models (GPT-5.3, Claude 4.6)

[2witstudios]

Summary

This PR adds support for the latest 2026 AI models across multiple providers: GPT-5.3 Codex from OpenAI and Claude Opus 4.6 from Anthropic. These models are now available through both direct provider APIs and the OpenRouter aggregation service.

Changes Made

• AI Providers Configuration: Added new 2026 model entries to the provider configurations:

  • OpenAI: gpt-5.3-codex (GPT-5.3 Codex)
  • Anthropic: claude-opus-4-6-20260204 (Claude Opus 4.6)
  • OpenRouter: Both models with their respective provider prefixes

• Model Capabilities: Updated vision capability mappings to include the new models:

  • gpt-5.3-codex and openai/gpt-5.3-codex marked as vision-capable
  • claude-opus-4-6-20260204 and anthropic/claude-opus-4.6 marked as vision-capable

Implementation Details

• New models are organized under "2026" comment sections, maintaining consistency with existing year-based grouping
• All new models are configured with vision capabilities enabled, consistent with their predecessors
• Changes maintain backward compatibility with existing 2025 models

https://claude.ai/code/session_01HjZYfzSMk93QtiabTaaerB

Summary by CodeRabbit

• New Features
  • Added new AI models: Claude Opus 4.6 (Anthropic) and GPT-5.3 Codex (OpenAI)
  • Expanded model availability across OpenRouter, OpenAI, and Anthropic integrations
  • Enabled vision capabilities for newly supported models

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[coderabbitai]

📝 Walkthrough

Walkthrough

The pull request extends the AI model registry by adding four new model entries across OpenRouter, OpenAI, and Anthropic providers, and registers these models in the vision-capability detection system. No functional behavior or logic is altered.

Changes

Cohort / File(s)	Summary
AI Provider Model Registrations apps/web/src/lib/ai/core/ai-providers-config.ts	Added four new model entries: Claude Opus 4.6 and GPT-5.3 Codex variants across OpenRouter, OpenAI, and Anthropic provider mappings.
Vision Capability Model Registry apps/web/src/lib/ai/core/model-capabilities.ts	Registered the new Claude Opus 4.6 and GPT-5.3 Codex variants in the vision-capable model lookup map.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• feat(ai): add GPT-5.2 models support #181: Modifies the same two files (ai-providers-config.ts and model-capabilities.ts) to add new AI model entries to provider and vision capability registries.
• feat: add Gemini 3 Flash (Preview) to AI providers #107: Updates AI provider mappings and the vision-capable model registry in the same files with new model entries.
• feat(ai): add Writer Palmyra X5 model to OpenRouter providers #313: Adds new model entries to the same AI_PROVIDERS.openrouter.models mapping.

Poem

🐰 New models hop into the fold,
Claude and GPT in sight,
Vision blooms where none was told,
Configuration shines so bright! ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title directly summarizes the main change: adding support for new 2026 AI models (GPT-5.3 and Claude 4.6), which aligns with the changeset's primary objective of registering new models across providers.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch claude/add-new-ai-models-Pd4hX

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