[BOT ISSUE] Anthropic: add missing `claude-opus-4-8` model

[github-actions]

Gap

The Anthropic model claude-opus-4-8 is missing from packages/proxy/schema/model_list.json. This is Anthropic's newest and most capable model, described as their top model for complex reasoning, long-horizon agentic coding, and high-autonomy work. It is listed as the primary recommended model on Anthropic's official models page and pricing page.

The catalog already has entries for Claude Opus 4.7 (claude-opus-4-7) and Claude Opus 4.6 (claude-opus-4-6) with the same pricing structure. Claude Opus 4.8 follows the identical pattern.

Official sources

Field	Source	URL
Model ID, context window, max output, capabilities	Anthropic Models page	https://platform.claude.com/docs/en/docs/about-claude/models/all-models
Pricing (input, output, cache read/write, batch)	Anthropic Pricing page	https://platform.claude.com/docs/en/about-claude/pricing

Verified fields

• Model ID: claude-opus-4-8 — confirmed on models page as "Claude API ID"
• Format: anthropic — same as all other Claude models in catalog
• Flavor: chat
• Multimodal: true — "All current Claude models support text and image input" (models page)
• Input cost: $5 / MTok — confirmed on both models page and pricing page
• Output cost: $25 / MTok — confirmed on both pages
• Cache read cost: $0.50 / MTok — confirmed on pricing page ("Cache Hits & Refreshes" column)
• Cache write (5m) cost: $6.25 / MTok — confirmed on pricing page ("5m Cache Writes" column)
• Cache write (1h) cost: $10 / MTok — confirmed on pricing page ("1h Cache Writes" column)
• Context window: 1,000,000 tokens (1M) — confirmed on models page
• Max output: 128,000 tokens (128k) — confirmed on models page
• Reasoning: true — model supports "Adaptive thinking" (models page)
• Reasoning budget: true — "Adaptive thinking: Yes" on models page (same pattern as existing claude-opus-4-7 entry)
• Extended thinking: No (models page) — consistent with claude-opus-4-7 which also has extended_thinking=No but reasoning=true
• DisplayName: "Claude 4.8 Opus" — follows existing convention (claude-opus-4-7 → "Claude 4.7 Opus")
• Available providers: ["anthropic"] — direct API entry; Bedrock/Vertex variants listed below as separate entries

Expected Bedrock/Vertex variant entries

Based on patterns from existing claude-opus-4-7 entries:

Variant ID	Provider	Notes
publishers/anthropic/models/claude-opus-4-8	vertex	Same pricing as direct
anthropic.claude-opus-4-8	bedrock	Base bedrock entry, same pricing
global.anthropic.claude-opus-4-8	bedrock	Global endpoint, parent: anthropic.claude-opus-4-8
us.anthropic.claude-opus-4-8	bedrock	US regional, 10% premium pricing, parent: anthropic.claude-opus-4-8

The Anthropic models page confirms: Bedrock ID is anthropic.claude-opus-4-8, Vertex AI ID is claude-opus-4-8.

Verification note

• Model ID, context, max output, capabilities: Confirmed on Anthropic models page (https://platform.claude.com/docs/en/docs/about-claude/models/all-models)
• Pricing (all fields): Confirmed on Anthropic pricing page (https://platform.claude.com/docs/en/about-claude/pricing)
• Bedrock/Vertex IDs: Confirmed on Anthropic models page in the comparison table
• Not published: Specific Bedrock/Vertex regional pricing (10% premium is inferred from the claude-opus-4-7 pattern and Anthropic's general documentation about regional pricing)

Local files inspected

• packages/proxy/schema/model_list.json — no entry for claude-opus-4-8 or any variant
• Existing claude-opus-4-7 entry at line 2222 used as reference for field structure

{
  "kind": "missing_model",
  "provider": "anthropic",
  "models": ["claude-opus-4-8"],
  "status": "active",
  "model_specs": {
    "claude-opus-4-8": {
      "format": "anthropic",
      "flavor": "chat",
      "multimodal": true,
      "input_cost_per_mil_tokens": 5,
      "output_cost_per_mil_tokens": 25,
      "input_cache_read_cost_per_mil_tokens": 0.5,
      "input_cache_write_cost_per_mil_tokens": 6.25,
      "input_cache_write_5m_cost_per_mil_tokens": 6.25,
      "input_cache_write_1h_cost_per_mil_tokens": 10,
      "displayName": "Claude 4.8 Opus",
      "reasoning": true,
      "reasoning_budget": true,
      "max_input_tokens": 1000000,
      "max_output_tokens": 128000,
      "available_providers": ["anthropic"]
    }
  },
  "source_urls": [
    "https://platform.claude.com/docs/en/docs/about-claude/models/all-models",
    "https://platform.claude.com/docs/en/about-claude/pricing"
  ]
}

Summary

Claude Opus 4.8 is Anthropic's latest flagship model, confirmed on both their models page and pricing page with consistent specifications. It follows the same pricing structure as Opus 4.7 and Opus 4.6 ($5/$25 per MTok). The primary catalog entry and its Bedrock/Vertex variants should be added to model_list.json.

[github-actions]

Prepared catalog updates for claude-opus-4-8. Added models: claude-opus-4-8.

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-opus-4-8: format=anthropic, flavor=chat, displayName=Claude 4.8 Opus, 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, reasoning_budget=true, multimodal=true

Opened #670 to apply the catalog update.