Claude Haiku 5.5 now available on AI Gateway
Claude Haiku 5.5 ships with adaptive thinking and effort levels. Now on Vercel's AI Gateway with zero data retention.
Why it matters
Anthropic's fastest Claude model gains reasoning capabilities and operational controls (effort levels, zero data retention) that matter for cost-conscious deployments at scale. Available on AI Gateway with unified API, pricing parity to provider rates, and no platform markup—lowering switching friction for teams standardizing on multi-model inference.
The key facts
19 to knowClaude Haiku 5.5 is Anthropic's fastest Claude model at standard speed
First Haiku model with effort levels (low, medium, high, xhigh, max) controlling thinking depth and token consumption
Adaptive thinking supported; thinking can be disabled at low/medium/high effort, mandatory at xhigh/max
Zero Data Retention support on AI Gateway
Biology and cybersecurity safeguards included (may decline some requests)
Available via AI SDK, Chat Completions, Responses, Anthropic Messages APIs, and coding agents
Model identifier: anthropic/claude-haiku-5.5
Works with Claude Code, Codex, Cursor via latest Vercel CLI
AI Gateway provides no-markup pricing (reflects provider rates), no platform fee on inference including BYOK
AI Gateway features: custom reporting, budgets per API key, routing rules, retries, failover, performance optimization
Integration: install latest Vercel CLI, run setup, select model in coding agent
Claude Haiku 5.5 available on Vercel AI Gateway
First Haiku model with adaptive thinking and effort levels (low, medium, high, xhigh, max)
Thinking can be disabled at low/medium/high effort; must remain on at xhigh/max
Fastest Claude model at standard speed, optimized for live customer support and browser use
Available via AI SDK, Chat Completions, Responses APIs, and coding agent integrations
Model name: anthropic/claude-haiku-5.5
AI Gateway provides unified API, usage tracking, cost control, retries, failover, routing, custom reporting, per-key budgets
AI Gateway reflects provider pricing with no markup, no platform fee on inference, BYOK (Bring Your Own Key) supported
The story so far
Earlier coverage of this storyline
- Microsoft AI models are now available on AI GatewayVercel Blog
- This story
Go to the source
Vercel Blogvercel.com
Publisher excerpt: from is now available on .Claude Haiku 5.5AnthropicAI Gateway It is built for high-volume, cost-sensitive tasks such as summaries, context compaction, database queries, and classification, and works as a subagent alongside larger Claude models on coding work. It is also the fastest Claude model at…