Anthropic Claude News

This feed includes only recent releases, roughly from the last 12 months, not the full historical archive. That is why a long-established product may have only a few news items.

6 news

Anthropic Claude
Claude Opus 5: a new flagship, available only via API/cloud

Opus 5 doubles Opus 4.8 score on Frontier-Bench and triples nearest competitor on ARC-AGI 3; pricing unchanged at $5/$25 per million input/output tokens. Weights closed: access only via Claude API, Claude.ai, Claude Code, and Claude Cowork; self-hosting impossible.

Qwen publishes weights openly for self-hosting in your infrastructure; Opus 5 has closed weights with Anthropic cloud dependency Alibaba Qwen →
Anthropic Claude
US orders Fable 5 and Mythos 5 disabled for all foreign users

Three days after release, a U.S. export directive required Anthropic to disable access to Fable 5 and Mythos 5 for all foreign nationals inside and outside the country. Closed weights in a vendor cloud can be revoked instantly by regulators, leaving enterprises with no lever to preserve access.

Anthropic Claude
MCP transferred to independent Agentic AI Foundation under Linux Foundation

Anthropic transferred Model Context Protocol governance to AAIF foundation, co-founders Block and OpenAI, supported by Google, Microsoft, AWS, Cloudflare, Bloomberg. Management and maintainers unchanged — goal to keep protocol vendor-neutral.

This is the same catalog protocol — now governed not by Anthropic alone but by an independent foundation with OpenAI/Block as co-founders MCP →
Anthropic Claude
Claude Opus 4.5: completion of the 4.5 line, cloud only

Opus 4.5 released 6 days after Gemini 3 Pro and 12 days after GPT-5.1, positioned as best for code/agents/computer use at the time. Effort parameter (low/medium/high) at medium delivers Sonnet 4.5 SWE-bench performance with 76% fewer output tokens; 200k/64k context, weights closed.

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