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Anthropic drops Claude Haiku 5.5 as StepFun debuts 1M-context Step 5 Preview for developers

October 11, 20264 updates

The latest wave of model releases focuses heavily on efficient context windows and developer ergonomics, highlighted by Anthropic rolling out its fast-tier Claude Haiku 5.5 and StepFun launching a million-token context preview model via API.

Anthropic Releases Claude Haiku 5.5

Source

2026-10-07

Offers founders an updated low-latency, low-cost frontier tier for high-throughput workflows and real-time agent loops.

StepFun Launches Step 5 Preview with 1M Token Context

Source

2026-10-08

Provides an accessible 1,000,000-token context window on OpenRouter for builders handling massive document sets and multi-file code analysis.

AI Agents Successfully Decompile FPS Game Using 500B Tokens

Source

2026-10-11

Proves the feasibility of massive long-horizon autonomous software reverse-engineering tasks running across billions of agent tokens.

Google Limited Deployment of Gemini 4 Argon for Cybersecurity

Source

2026-10-01

Signals next-gen frontier capabilities arriving first via gated enterprise programs before general developer API availability.

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