[BOT ISSUE] Anthropic: update Claude Sonnet 4.6 max_output_tokens from 64000 to 128000

[github-actions]

Summary

Claude Sonnet 4.6 (claude-sonnet-4-6) has max_output_tokens: 64000 in the catalog, but Anthropic's official documentation states the max output is 128,000 tokens. This affects the primary Anthropic API entry and all provider-specific entries (Bedrock and Vertex).

The 128k output limit is confirmed on both the models overview page (comparison table: "Max output: 128k tokens") and the pricing page (long-context section lists Sonnet 4.6 alongside other 128k-output models). This is consistent with Claude Opus 4.8, Opus 4.7, and Opus 4.6 — all of which already have max_output_tokens: 128000 in the catalog.

Affected Entries

Model ID	Provider	Current max_output_tokens	Correct Value	Line
claude-sonnet-4-6	anthropic	64000	128000	~1638
anthropic.claude-sonnet-4-6	bedrock	64000	128000	~6804
publishers/anthropic/models/claude-sonnet-4-6	vertex	64000	128000	~8185

Two additional Bedrock regional entries also need the same update:

• us.anthropic.claude-sonnet-4-6 (line ~6768) — 64000 → 128000
• global.anthropic.claude-sonnet-4-6 (line ~6786) — 64000 → 128000

All other fields (pricing, format, reasoning, etc.) are correct and unchanged.

Verification

Check	Status	Detail
Cross-source (max_output_tokens)	✅	Models overview: comparison table says "Max output: 128k tokens" AND Pricing page: long-context section lists Sonnet 4.6 alongside other 128k-output models
Already fixed	✅	Confirmed all 5 entries still have max_output_tokens: 64000 in model_list.json
Sibling consistency	✅	Claude Opus 4.8, Opus 4.7, and Opus 4.6 all already have max_output_tokens: 128000 in the catalog
Duplicate check	✅	No open issue covers Claude Sonnet 4.6 max_output_tokens

Verification Notes

Field	Source	Notes
Max output = 128k tokens	Models overview	Comparison table explicitly says "128k tokens" for Claude Sonnet 4.6
Max output = 128k tokens	Pricing page	"Claude Fable 5, Claude Opus 4.8, Opus 4.7, Opus 4.6, and Sonnet 4.6 include the full 1M token context window at standard pricing" — grouped with other 128k-output models
300k via Batch API	Models overview	"On the Message Batches API, Claude Opus 4.8, Opus 4.7, Opus 4.6, and Sonnet 4.6 support up to 300k output tokens" — not relevant to max_output_tokens field

Local Files Inspected

• packages/proxy/schema/model_list.json — all 5 Sonnet 4.6 entries confirmed at 64000
• Claude Sonnet 4.5 (claude-sonnet-4-5) correctly has max_output_tokens: 64000 — this is NOT affected (Sonnet 4.5 docs confirm 64k)

{
  "kind": "stale_metadata",
  "provider": "anthropic",
  "models": ["claude-sonnet-4-6", "anthropic.claude-sonnet-4-6", "publishers/anthropic/models/claude-sonnet-4-6"],
  "status": "active",
  "model_specs": {
    "claude-sonnet-4-6": {
      "format": "anthropic",
      "flavor": "chat",
      "multimodal": true,
      "input_cost_per_mil_tokens": 3,
      "output_cost_per_mil_tokens": 15,
      "input_cache_read_cost_per_mil_tokens": 0.3,
      "input_cache_write_cost_per_mil_tokens": 3.75,
      "input_cache_write_5m_cost_per_mil_tokens": 3.75,
      "input_cache_write_1h_cost_per_mil_tokens": 6,
      "displayName": "Claude Sonnet 4.6",
      "reasoning": true,
      "reasoning_budget": true,
      "fallback_models": [
        "anthropic.claude-sonnet-4-6",
        "global.anthropic.claude-sonnet-4-6",
        "publishers/anthropic/models/claude-sonnet-4-6",
        "us.anthropic.claude-sonnet-4-6"
      ],
      "max_input_tokens": 1000000,
      "max_output_tokens": 128000,
      "available_providers": ["anthropic"]
    },
    "anthropic.claude-sonnet-4-6": {
      "format": "anthropic",
      "flavor": "chat",
      "multimodal": true,
      "input_cost_per_mil_tokens": 3,
      "output_cost_per_mil_tokens": 15,
      "input_cache_read_cost_per_mil_tokens": 0.3,
      "input_cache_write_cost_per_mil_tokens": 3.75,
      "displayName": "Claude Sonnet 4.6",
      "reasoning": true,
      "reasoning_budget": true,
      "max_input_tokens": 1000000,
      "max_output_tokens": 128000,
      "available_providers": ["bedrock"]
    },
    "publishers/anthropic/models/claude-sonnet-4-6": {
      "format": "anthropic",
      "flavor": "chat",
      "multimodal": true,
      "input_cost_per_mil_tokens": 3,
      "output_cost_per_mil_tokens": 15,
      "input_cache_read_cost_per_mil_tokens": 0.3,
      "input_cache_write_cost_per_mil_tokens": 3.75,
      "input_cache_write_5m_cost_per_mil_tokens": 3.75,
      "input_cache_write_1h_cost_per_mil_tokens": 6,
      "displayName": "Claude Sonnet 4.6",
      "reasoning": true,
      "reasoning_budget": true,
      "max_input_tokens": 1000000,
      "max_output_tokens": 128000,
      "available_providers": ["vertex"]
    }
  },
  "source_urls": [
    "https://platform.claude.com/docs/en/docs/about-claude/models/all-models",
    "https://platform.claude.com/docs/en/about-claude/pricing"
  ]
}

[github-actions]

Prepared catalog updates for claude-sonnet-4-6, us.anthropic.claude-sonnet-4-6, global.anthropic.claude-sonnet-4-6, anthropic.claude-sonnet-4-6, publishers/anthropic/models/claude-sonnet-4-6. Updated models: claude-sonnet-4-6, us.anthropic.claude-sonnet-4-6, global.anthropic.claude-sonnet-4-6, anthropic.claude-sonnet-4-6, publishers/anthropic/models/claude-sonnet-4-6.

Verification sources: https://platform.claude.com/docs/en/docs/about-claude/models/all-models, https://platform.claude.com/docs/en/about-claude/pricing, https://platform.claude.com/docs/en/build-with-claude/claude-on-vertex-ai
Verified metadata applied:

• claude-sonnet-4-6: format=anthropic, flavor=chat, displayName=Claude Sonnet 4.6, max_input_tokens=1000000, max_output_tokens=128000, pricing(input/output per 1M)=3/15, input_cache_read_cost_per_mil_tokens=0.3, input_cache_write_cost_per_mil_tokens=3.75, providers=anthropic, reasoning=true, reasoning_budget=true, multimodal=true
• us.anthropic.claude-sonnet-4-6: format=anthropic, flavor=chat, displayName=US Claude 4.6 Sonnet, parent=anthropic.claude-sonnet-4-6, max_input_tokens=1000000, max_output_tokens=128000, pricing(input/output per 1M)=3.3/16.5, input_cache_read_cost_per_mil_tokens=0.33, input_cache_write_cost_per_mil_tokens=4.125, providers=bedrock, reasoning=true, reasoning_budget=true, multimodal=true
• global.anthropic.claude-sonnet-4-6: format=anthropic, flavor=chat, displayName=Global Claude 4.6 Sonnet, parent=anthropic.claude-sonnet-4-6, max_input_tokens=1000000, max_output_tokens=128000, pricing(input/output per 1M)=3/15, input_cache_read_cost_per_mil_tokens=0.3, input_cache_write_cost_per_mil_tokens=3.75, providers=bedrock, reasoning=true, reasoning_budget=true, multimodal=true
• anthropic.claude-sonnet-4-6: format=anthropic, flavor=chat, displayName=Claude Sonnet 4.6, max_input_tokens=1000000, max_output_tokens=128000, pricing(input/output per 1M)=3/15, input_cache_read_cost_per_mil_tokens=0.3, input_cache_write_cost_per_mil_tokens=3.75, providers=bedrock, reasoning=true, reasoning_budget=true, multimodal=true
• publishers/anthropic/models/claude-sonnet-4-6: format=anthropic, flavor=chat, displayName=Claude Sonnet 4.6, max_input_tokens=1000000, max_output_tokens=128000, pricing(input/output per 1M)=3/15, input_cache_read_cost_per_mil_tokens=0.3, input_cache_write_cost_per_mil_tokens=3.75, providers=vertex, locations=global, reasoning=true, reasoning_budget=true, multimodal=true

Included in the daily batch PR: #886

[github-actions]

Prepared catalog updates for claude-sonnet-4-6, anthropic.claude-sonnet-4-6, us.anthropic.claude-sonnet-4-6, global.anthropic.claude-sonnet-4-6, publishers/anthropic/models/claude-sonnet-4-6. Updated models: claude-sonnet-4-6, anthropic.claude-sonnet-4-6, us.anthropic.claude-sonnet-4-6, global.anthropic.claude-sonnet-4-6, publishers/anthropic/models/claude-sonnet-4-6.

Verification sources: https://platform.claude.com/docs/en/docs/about-claude/models/all-models, https://platform.claude.com/docs/en/about-claude/pricing, https://platform.claude.com/docs/en/build-with-claude/claude-on-vertex-ai
Verified metadata applied:

• claude-sonnet-4-6: format=anthropic, flavor=chat, displayName=Claude Sonnet 4.6, max_input_tokens=1000000, max_output_tokens=128000, pricing(input/output per 1M)=3/15, input_cache_read_cost_per_mil_tokens=0.3, input_cache_write_cost_per_mil_tokens=3.75, providers=anthropic, reasoning=true, reasoning_budget=true, multimodal=true
• anthropic.claude-sonnet-4-6: format=anthropic, flavor=chat, displayName=Claude Sonnet 4.6, max_input_tokens=1000000, max_output_tokens=128000, pricing(input/output per 1M)=3/15, input_cache_read_cost_per_mil_tokens=0.3, input_cache_write_cost_per_mil_tokens=3.75, providers=bedrock, reasoning=true, reasoning_budget=true, multimodal=true
• us.anthropic.claude-sonnet-4-6: format=anthropic, flavor=chat, displayName=US Claude 4.6 Sonnet, parent=anthropic.claude-sonnet-4-6, max_input_tokens=1000000, max_output_tokens=128000, pricing(input/output per 1M)=3.3/16.5, input_cache_read_cost_per_mil_tokens=0.33, input_cache_write_cost_per_mil_tokens=4.125, providers=bedrock, reasoning=true, reasoning_budget=true, multimodal=true
• global.anthropic.claude-sonnet-4-6: format=anthropic, flavor=chat, displayName=Global Claude 4.6 Sonnet, parent=anthropic.claude-sonnet-4-6, max_input_tokens=1000000, max_output_tokens=128000, pricing(input/output per 1M)=3/15, input_cache_read_cost_per_mil_tokens=0.3, input_cache_write_cost_per_mil_tokens=3.75, providers=bedrock, reasoning=true, reasoning_budget=true, multimodal=true
• publishers/anthropic/models/claude-sonnet-4-6: format=anthropic, flavor=chat, displayName=Claude Sonnet 4.6, max_input_tokens=1000000, max_output_tokens=128000, pricing(input/output per 1M)=3/15, input_cache_read_cost_per_mil_tokens=0.3, input_cache_write_cost_per_mil_tokens=3.75, providers=vertex, locations=global, reasoning=true, reasoning_budget=true, multimodal=true

Included in the daily batch PR: #887

[github-actions]

Prepared catalog updates for claude-sonnet-4-6, anthropic.claude-sonnet-4-6, publishers/anthropic/models/claude-sonnet-4-6, us.anthropic.claude-sonnet-4-6, global.anthropic.claude-sonnet-4-6. Updated models: claude-sonnet-4-6, anthropic.claude-sonnet-4-6, publishers/anthropic/models/claude-sonnet-4-6, us.anthropic.claude-sonnet-4-6, global.anthropic.claude-sonnet-4-6.

Verification sources: https://platform.claude.com/docs/en/docs/about-claude/models/all-models, https://platform.claude.com/docs/en/about-claude/pricing, https://platform.claude.com/docs/en/build-with-claude/claude-on-vertex-ai
Verified metadata applied:

• claude-sonnet-4-6: format=anthropic, flavor=chat, displayName=Claude Sonnet 4.6, max_input_tokens=1000000, max_output_tokens=128000, pricing(input/output per 1M)=3/15, input_cache_read_cost_per_mil_tokens=0.3, input_cache_write_cost_per_mil_tokens=3.75, providers=anthropic, reasoning=true, reasoning_budget=true, multimodal=true
• anthropic.claude-sonnet-4-6: format=anthropic, flavor=chat, displayName=Claude Sonnet 4.6, max_input_tokens=1000000, max_output_tokens=128000, pricing(input/output per 1M)=3/15, input_cache_read_cost_per_mil_tokens=0.3, input_cache_write_cost_per_mil_tokens=3.75, providers=bedrock, reasoning=true, reasoning_budget=true, multimodal=true
• publishers/anthropic/models/claude-sonnet-4-6: format=anthropic, flavor=chat, displayName=Claude Sonnet 4.6, max_input_tokens=1000000, max_output_tokens=128000, pricing(input/output per 1M)=3/15, input_cache_read_cost_per_mil_tokens=0.3, input_cache_write_cost_per_mil_tokens=3.75, providers=vertex, locations=global, reasoning=true, reasoning_budget=true, multimodal=true
• us.anthropic.claude-sonnet-4-6: format=anthropic, flavor=chat, displayName=US Claude 4.6 Sonnet, parent=anthropic.claude-sonnet-4-6, max_input_tokens=1000000, max_output_tokens=128000, pricing(input/output per 1M)=3.3/16.5, input_cache_read_cost_per_mil_tokens=0.33, input_cache_write_cost_per_mil_tokens=4.125, providers=bedrock, reasoning=true, reasoning_budget=true, multimodal=true
• global.anthropic.claude-sonnet-4-6: format=anthropic, flavor=chat, displayName=Global Claude 4.6 Sonnet, parent=anthropic.claude-sonnet-4-6, max_input_tokens=1000000, max_output_tokens=128000, pricing(input/output per 1M)=3/15, input_cache_read_cost_per_mil_tokens=0.3, input_cache_write_cost_per_mil_tokens=3.75, providers=bedrock, reasoning=true, reasoning_budget=true, multimodal=true

Included in the daily batch PR: #892

[github-actions]

Prepared catalog updates for claude-sonnet-4-6, anthropic.claude-sonnet-4-6, publishers/anthropic/models/claude-sonnet-4-6. Updated models: claude-sonnet-4-6, anthropic.claude-sonnet-4-6, publishers/anthropic/models/claude-sonnet-4-6.

Verification sources: https://platform.claude.com/docs/en/docs/about-claude/models/all-models, https://platform.claude.com/docs/en/about-claude/pricing
Verified metadata applied:

• claude-sonnet-4-6: format=anthropic, flavor=chat, displayName=Claude Sonnet 4.6, max_input_tokens=1000000, max_output_tokens=128000, pricing(input/output per 1M)=3/15, input_cache_read_cost_per_mil_tokens=0.3, input_cache_write_cost_per_mil_tokens=3.75, providers=anthropic, reasoning=true, reasoning_budget=true, multimodal=true
• anthropic.claude-sonnet-4-6: format=anthropic, flavor=chat, displayName=Claude Sonnet 4.6, max_input_tokens=1000000, max_output_tokens=128000, pricing(input/output per 1M)=3/15, input_cache_read_cost_per_mil_tokens=0.3, input_cache_write_cost_per_mil_tokens=3.75, providers=bedrock, reasoning=true, reasoning_budget=true, multimodal=true
• publishers/anthropic/models/claude-sonnet-4-6: format=anthropic, flavor=chat, displayName=Claude Sonnet 4.6, max_input_tokens=1000000, max_output_tokens=128000, pricing(input/output per 1M)=3/15, input_cache_read_cost_per_mil_tokens=0.3, input_cache_write_cost_per_mil_tokens=3.75, providers=vertex, reasoning=true, reasoning_budget=true, multimodal=true

Included in the daily batch PR: #904