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anthropic/claude-sonnet-5-5 Details | respan/span-01-lite Details | jaredpalmer/kev-4b Details | |
|---|---|---|---|
| Overview | |||
| Description | Anthropic's Claude Sonnet 5.5 is the successor to Claude Sonnet 5 — the best combination of speed and intelligence in the lineup. It is the direct upgrade for well-scoped everyday work (building features, fixing bugs, drafting and review) at the same $2 / $10 per million input / output rates, with adaptive thinking on by default at `high` effort, 1M-token context, 128K max output, vision input, and tool use. Faster than Opus 5.5, cheaper, same window. | Span-01 Lite is a behavior-scoring classifier from Respan — the free, lighter tier of Span-01, a 4B model trained with RLAIF on classification reasoning rather than fixed taxonomies. Send a conversation span and a set of plain-language behavior definitions and get a present / absent / not_observable probability per behavior in a single forward pass, with no token-by-token generation. Respan reports it ahead of Jev 1.13 and Sonnet 5 on their English and multilingual behavior-detection suites. Call POST /api/v1/decisions (POST /api/v1/systemone is the same handler). | Kev 4B is a small open-weight decision model from Jared Palmer — a LoRA adapter and pointer head on Qwen3.5-4B-Base. Send state and typed questions (noul / choice / score) and get a calibrated probability per question in one forward pass, not generated text. Call POST /api/v1/decisions (POST /api/v1/systemone is the same handler). |
| Category | Text Generation | Text Generation | Text Generation |
| Context length | 1M | 0 | 8K |
| Providers | 3 | 1 | 2 |
| Pricing (per 1M tokens) | |||
| Input | $2.00 | $0 | $0.04 |
| Output | $10.00 | $0 | $0 |
| Capabilities | |||
| Reasoning | – | – | |
| Tool calling | – | – | |
| Vision | – | – | |
| Streaming | – | – | |
| Token activity (30 days) | |||
| Usage |