[BOT ISSUE] Anthropic: claude-opus-4-1 and claude-opus-4-6-20260205 have wrong format field

[github-actions]

Summary

Two Claude model entries in model_list.json have "format": "openai" but should be "format": "anthropic". These models have available_providers: ["anthropic"], meaning they use the Anthropic API format, not OpenAI.

Affected entries

claude-opus-4-1 (line 2385)

"claude-opus-4-1": {
  "format": "openai",  // ← BUG: should be "anthropic"
  ...
  "available_providers": ["anthropic"]
}

claude-opus-4-6-20260205 (line 2311)

"claude-opus-4-6-20260205": {
  "format": "openai",  // ← BUG: should be "anthropic"
  ...
  "parent": "claude-opus-4-6",
  "available_providers": ["anthropic"]
}

Evidence this is a bug

• The parent entry claude-opus-4-6 (line 2276) correctly has "format": "anthropic"
• The dated snapshot claude-opus-4-1-20250805 (line 2404) correctly has "format": "anthropic" (via its parent)
• The Vertex variant publishers/anthropic/models/claude-opus-4-1@20250805 (line 2424) correctly has "format": "anthropic"
• All other claude-opus-* and claude-sonnet-* entries with anthropic provider use "format": "anthropic"

Suggested fix

Change "format": "openai" to "format": "anthropic" on both entries.

Verification

• Source 1: Pattern analysis of all Claude entries in model_list.json — all other entries with available_providers: ["anthropic"] use "format": "anthropic"
• Source 2: Anthropic API docs (https://docs.anthropic.com/en/docs/about-claude/models) — confirm these are Anthropic-format models
• Recent commits: No recent commits changing the format field on these entries

[github-actions]

Prepared catalog updates for claude-opus-4-1, claude-opus-4-6-20260205. Updated models: claude-opus-4-1, claude-opus-4-6-20260205.

Verification sources: https://docs.anthropic.com/en/docs/about-claude/models
Verified metadata applied:

• claude-opus-4-1: format=anthropic, flavor=chat, displayName=Claude 4.1 Opus, max_input_tokens=200000, max_output_tokens=32000, pricing(input/output per 1M)=15/75, input_cache_read_cost_per_mil_tokens=1.5, input_cache_write_cost_per_mil_tokens=18.75, providers=anthropic, reasoning=true, multimodal=true
• claude-opus-4-6-20260205: format=anthropic, flavor=chat, displayName=Claude 4.6 Opus (2026-02-05), parent=claude-opus-4-6, max_input_tokens=1000000, max_output_tokens=128000, pricing(input/output per 1M)=5/25, input_cache_read_cost_per_mil_tokens=0.5, input_cache_write_cost_per_mil_tokens=6.25, providers=anthropic, reasoning=true, multimodal=true

Opened #689 to apply the catalog update.