AI BriefingAnthropic's Claude Haiku 5.5 Now Available on AI Gateway
Key point
The model introduces effort levels and adaptive thinking, supporting low to max settings to control token usage and reasoning depth.
Details
Anthropic's Claude Haiku 5.5 is now available on AI Gateway, positioned as the fastest Claude model at standard speed for high-volume, cost-sensitive tasks like summaries, database queries, and live customer support. It serves as a subagent alongside larger Claude models for coding work and acts as a direct upgrade for users currently on Claude Haiku 4.5.
Effort Levels and Thinking Control
Haiku 5.5 is the first Haiku model to support effort levels, utilizing adaptive thinking to balance reasoning depth with token consumption. Users can select from low, medium, high, xhigh, and max effort settings. Thinking can be disabled at low, medium, and high levels, but must remain enabled at xhigh and max.
Integration and Availability
The model is accessible via the AI SDK, Chat Completions, Responses, and Anthropic Messages APIs, as well as through coding agents connected to AI Gateway. To use it in tools like Claude Code, Codex, or Cursor, users must install the latest Vercel CLI and select the model name anthropic/claude-haiku-5.5. AI Gateway provides unified API access, usage tracking, and cost management without platform fees or markup on provider pricing.
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