Developer Tools & APIs
Claude Opus 4.1 retires on 5 August 2026: migrate to Opus 4.8 now
The claude-opus-4-1-20250805 model ID stops working on 5 August 2026. Here's what to change and why Opus 4.8 is the right target.
Topic
Claude API
13 posts about Claude API from Simon Carter.
Developer Tools & APIs
Anthropic is retiring the legacy Claude Workbench and three experimental prompt API endpoints on 17 August 2026
The legacy Workbench and three /v1/experimental/ prompt endpoints shut down 17 August 2026. Here's what to export and what replaces them.
Developer Tools & APIs
Anthropic is retiring Claude Opus 4.1 on August 5, 2026 — here's what developers need to do
Anthropic has deprecated claude-opus-4-1-20250805 with a retirement date of August 5, 2026. Opus 4.8 is the recommended replacement.
Developer Tools & APIs
Claude Sonnet 4 and Opus 4 are gone from the API — here's what to do
As of June 15, 2026, claude-sonnet-4-20250514 and claude-opus-4-20250514 return errors. Migrate to Sonnet 4.6 and Opus 4.8.
Cloud & Infrastructure
Claude went down twice in 14 hours — and Anthropic's uptime numbers tell the full story
Two Claude outages in 14 hours on June 22–23 pushed 90-day uptime below enterprise SLA thresholds, with 8,000+ Downdetector reports at peak.
Developer Tools & APIs
claude-mythos-preview Is Deprecated — But Its Replacement Is Currently Unavailable
Anthropic has formally deprecated claude-mythos-preview with a June 30 2026 retirement date, directing developers to migrate to claude-mythos-5 — which is currently suspended.
Developer Tools & APIs
Claude Agent SDK Billing Splits on June 15: What the New Credit Pool Means for Your Plan
From June 15, Claude Agent SDK, claude -p, GitHub Actions, and third-party agents draw from a separate monthly credit, not your subscription quota.
Models & Assistants
Claude Fable 5 is here: Anthropic's first public Mythos-class model, with a safety wall built in
Anthropic launches Claude Fable 5 with a 1M-token context window, $10/$50 pricing, and a safety-classifier fallback — plus a restricted Mythos 5 for Project Glasswing partners.
Security & Governance
Claude Managed Agents can now store API keys in a vault — and the agent never sees them
Anthropic's vault-stored environment variables let Claude Managed Agents authenticate CLI tools without the API key ever entering the agent's context window.
Cloud & Infrastructure
Claude Opus 4.8 and Haiku 4.5 are now generally available in Microsoft Foundry on Azure
Azure becomes the only cloud with both OpenAI and Claude frontier models, as Claude Opus 4.8 and Haiku 4.5 go GA in Microsoft Foundry on NVIDIA GB300 GPUs.
Agents & Automation
Anthropic updates Claude Managed Agents: self-hosted sandboxes, mid-session tool swapping, and cache diagnostics
Anthropic ships three Claude Managed Agents platform updates giving enterprise developers more infrastructure control, runtime flexibility, and prompt-cache transparency.
Developer Tools & APIs
ClaudeForFoundationModels: Anthropic's Swift package brings Claude into Apple's Foundation Models framework
Anthropic's new Swift package lets iOS/macOS 27 developers use Claude as a drop-in server-side model via Apple's LanguageModelSession API.
Developer Tools & APIs
Anthropic Claude API: Zero-Cost Refusals and a Smarter Advisor Tool for Agentic Pipelines
Anthropic now bills zero for API refusals with no output, and the advisor tool gets a max_tokens cap to control cost and latency in agentic workloads.