# Anthropic announces Claude Opus 5.5, live on AWS, GCP and Azure

> Updated 2026-09-23 · type: news · category: ai-infrastructure · status: active · rev 1

Anthropic released Claude Opus 5.5 on AWS, GCP and Azure at $4 per million input and $20 per million output tokens.

- Open source: no
- Last verified: 2026-09-23

- **Canonical:** https://gtmstacker.com/registry/news/claude-opus-5-5/
- **Source:** [anthropic.com](https://www.anthropic.com/claude-opus-5-5)
- **Tags:** ai-infrastructure, news, model-release, model-selection, pricing

## Is Anthropic announces Claude Opus 5.5, live on AWS, GCP and Azure open source?

No, Anthropic announces Claude Opus 5.5, live on AWS, GCP and Azure is not open source.


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On Sep 22, 2026, Anthropic announced Claude Opus 5.5, its new flagship model, available across AWS, GCP and Azure. Published pricing is $4 per million input tokens and $20 per million output tokens, with prompt caching at $0.20 per million read and $5 per million write. Anthropic's claims of benchmark superiority, "Fable-5.1-level on most work" and roughly 40% lower run cost than Opus 5 are vendor characterizations, not independently verified here.

## Notes

- What is confirmed: Anthropic announced Claude Opus 5.5 on Sep 22, 2026, live on AWS, GCP and Azure; pricing is $4 in / $20 out per million tokens, with caching at $0.20 read / $5 write per million (official page, WebFetch 2026-09-23; corroborated by tier-1 press 2026-09-22).
- What is vendor-claimed (tagged, not treated as fact): benchmark superiority, "Fable-5.1-level on most work," and "~40% lower run cost than Opus 5."
- The GTM-stack read: for anyone running agentic workloads, a new flagship is a model-selection data point — the numbers that matter for build-vs-buy are the token prices and caching rates, which are confirmed, more than the vendor's relative-quality and cost claims, which are not. Slot the confirmed pricing into your own cost model before acting on the comparative framing. Releases the same day as OpenAI's GPT-6 Sol and Luna — a two-vendor model-refresh moment worth pricing out together.
- Curated from the GTM Stacker signal registry (2026-09-23 pass: studio news lane).