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27 posts about Claude API from Simon Carter.
Anthropic's Claude Sonnet 5.5 runs 30%+ faster at unchanged Sonnet 5 pricing, adds cyber safeguards, and ships with zero data retention across AWS, Google Cloud, and Azure.
Anthropic's new portal at claude.ai/directory/manage lets paid-plan developers submit, track, and publish Claude plugins, with MCP 2.0 support built in.
Anthropic's Claude Opus 5.5 matches Fable 5.1 on key benchmarks, cuts API costs 20: 60%, and raises usage limits for Pro and Team subscribers.
Verified life-science organisations can now apply for relaxed Claude safeguards across claude.ai, the API, and enterprise plans from 17 September 2026.
Anthropic released a forkable commerce agents blueprint on 2 September 2025, with shopper and merchant reference implementations deployable via Claude API, Bedrock, Foundry, or Vertex.
Anthropic launches Claude Fable 5.1 with cache reads cut 75% to $0.25/MTok, saving up to 45% on agentic workloads. Mythos 5.1 stays restricted.
Anthropic has confirmed the $2/$10 per million token rate for Claude Sonnet 5 is now permanent. The planned 50% increase from 1 September 2026 will not happen.
The Files API beta header is no longer required on /v1/files endpoints, simplifying file-grounded Claude API integrations from 20 August 2026.
Anthropic explains its SynthID-Text watermarking for Claude: how it works, what it survives, its limits, and a detection API coming soon.
The legacy Claude Workbench and three /v1/experimental/ prompt API endpoints reach end of life on 17 August 2026. Here's what to do.
From 2 August 2026, all Claude models watermark generated text and attach C2PA metadata to files: globally, with no opt-out.
From 24 July 2026, speed: 'fast' on Opus 4.7 returns a hard 400 error. Here's what to fix and what the new fallbacks default mode gives you.
The claude-opus-4-1-20250805 model ID retired on 5 August 2026. API calls to it now return a hard 404. Here is what to do.
A major multi-model outage on 5 August 2026 took down Claude Mythos 5, Fable 5, Opus 5, and Sonnet 5 for 7.5 hours: the 164th disruption of 2026.
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.
The legacy Workbench and three /v1/experimental/ prompt endpoints shut down 17 August 2026. Here's what to export and what replaces them.
Anthropic has deprecated claude-opus-4-1-20250805 with a retirement date of August 5, 2026. Opus 4.8 is the recommended replacement.
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.
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.
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.
From June 15, Claude Agent SDK, claude -p, GitHub Actions, and third-party agents draw from a separate monthly credit, not your subscription quota.
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.
Anthropic's vault-stored environment variables let Claude Managed Agents authenticate CLI tools without the API key ever entering the agent's context window.
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.
Anthropic ships three Claude Managed Agents platform updates giving enterprise developers more infrastructure control, runtime flexibility, and prompt-cache transparency.
Anthropic's new Swift package lets iOS/macOS 27 developers use Claude as a drop-in server-side model via Apple's LanguageModelSession API.
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.