$ diff claude-sonnet-5-5 inkling
Claude Sonnet 5.5 vs Inkling
Values come from Claude Sonnet 5.5 and Inkling, where each is cited to its source. This page states no benchmark result and ranks neither model — it puts two published specifications next to each other. Where a lab has not published a figure, the row says so rather than guessing.
AnthropicClaude Sonnet 5.5
- context
- 1M
- weights
- closed
- $/M in
- $2
- $/M out
- $10
- context
- 1M
- weights
- open
- $/M in
- —
- $/M out
- —
What actually differs
- Context window
- Identical — both accept 1M tokens, so context length is not a reason to pick either.
- Weights
- Inkling publishes weights (Apache 2.0 (open-weight)); Claude Sonnet 5.5 is API-only. That decides self-hosting, air-gapped deployment and fine-tuning before any capability question does.
- Recency
- Claude Sonnet 5.5 shipped 75 days after Inkling (2026-09-28 vs 2026-07-15).
Full spec
| Attribute | Claude Sonnet 5.5 | Inkling |
|---|---|---|
| Developer | Anthropic | Thinking Machines |
| Released | 2026-09-28 | 2026-07-15 |
| Context window | 1M tokens | 1M |
| Pricing | $2/M input · $10/M output · cache reads 10% of base input | not recorded |
| License | proprietary (API-only; no weight release) | Apache 2.0 (open-weight) |
| Availability | Claude apps, Claude API as `claude-sonnet-5-5`, Amazon Bedrock, Google Cloud Vertex AI, Microsoft Foundry, Claude Platform on AWS | Hugging Face (BF16 and NVFP4), Tinker (fine-tuning), SGLang, vLLM, llama.cpp, Unsloth |