AI Launch Profile
Anthropic Claude Opus 4.1 retirement deadline: August 5, 2026
Anthropic announced the retirement of claude-opus-4-1-20250805 on the Claude API for August 5, 2026 and recommends claude-opus-4-8. Anthropic notes that partner-platform schedules can differ from its operated API surfaces.
At a glance
Launch Snapshot
- Company
- Anthropic
- Launch date
- June 5, 2026
- Launch type
- Not classified
- Category
- AI Agents, AI Developer Tools, AI Models
- Pricing
- There is no separate retirement or migration fee. Replacement-model usage follows current Anthropic or partner-platform pricing; re-baseline tokens, caching, latency and workload cost on the actual serving platform.
- Free plan
- No
- API
- Yes
- Open weights/source
- No
Launch Context
Use these links to move from this record into the broader Launch Intelligence database.
Verification & Sources
- Status
- Verified
- Source links
- 3
- Freshness
- Verified July 28, 2026
- Last verified
- July 28, 2026
- Last updated
- July 28, 2026
Key source checks
Suggest a correction
Kingy AI Take
Treat August 5 as a model retirement deadline, not a product launch or a blind model-ID replacement. Inventory traffic by provider, confirm which schedule governs each endpoint, move to claude-opus-4-8 where Anthropic directs, and regression-test prompts, tool schemas, streaming, structured outputs, safety behavior, latency and cost with rollback before retiring the old route.
Who it is for
Developers, agent teams, platform owners and engineering leaders with production requests pinned to the dated Claude Opus 4.1 model ID.
What feels promising
Anthropic publishes the exact dated model ID, retirement date and recommended replacement, giving API owners a clear target for a staged cutover.
What feels unproven
Kingy did not run an Opus 4.1-to-4.8 migration. Prompt behavior, tool-call arguments, output length, refusals, caching, latency and cost can change, while AWS Bedrock and Google Cloud schedules may differ.
Source-backed record