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Claude Haiku 4.5 is Anthropic's fast, affordable small model in the Claude 4 generation, balancing strong instruction-following and coding ability with low latency. It is designed for high-throughput agentic and chat applications where speed and cost efficiency are priorities.
This is the free OpenRouter endpoint for Thinking Machines Lab's Inkling-Small, a 276B-parameter mixture-of-experts model (12B active, Apache 2.0 license, 1M-token context) released July 30, 2026 as the smaller, efficient sibling in the Inkling family. Free access is rate-limited to agentic-harness use with prompt and output logging, making it best suited for evaluating its coding, agentic, and RAG capabilities rather than production workloads.
Benchmarks
Head-to-head scores across reasoning, coding, and agentic indices, plus per-domain rankings.
Intelligence
Claude Opus 5.5 (Max, Default Fallback)Claude Sonnet 5.5 (Max, Default Fallback)
