Claude Sonnet 4.6 is Anthropic's mid-tier large language model, released February 17, 2026, designed to balance performance, cost, and versatility for professional and developer use. It supports text and vision-based tasks with advanced reasoning, agentic capabilities, and Adaptive Thinking — a mode where the model dynamically scales its internal reasoning depth. A beta context window of up to 1,000,000 tokens (200K standard) enables processing of entire codebases or document collections in a single request. Parameters are undisclosed.
Optimized for coding, computer use, long-context reasoning, agent planning, and knowledge work, Sonnet 4.6 delivers a full generational upgrade over Sonnet 4.5 and approaches Opus 4.5-level performance across many benchmarks at a fraction of the cost. It is the default model on Claude.ai, Claude Cowork, and is available via API and major cloud platforms — making it well suited for production workloads requiring strong reasoning without flagship pricing.
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Past 30 DaysClaude Sonnet 4.6 has not yet been evaluated on the current benchmark. The results below are from the legacy version of Vision Evals, our previous benchmark. See the current Vision Evals
| Category | Passed | Score |
|---|---|---|
| Defect Detection | 12 / 15 | 80% |
| Spatial Understanding | 15 / 19 | 78.9% |
| Document Understanding | 7 / 9 | 77.8% |
| Object Understanding | 10 / 14 | 71.4% |
| Object Counting | 3 / 10 | 30% |
| Category | Passed | Score |
|---|---|---|
| License Plate Recognition | 27 / 30 | 90% |
| Text Recognition | 26 / 30 | 86.7% |
| Focused Scene OCR | 85 / 99 | 85.9% |
| VQA & Extraction | 44 / 60 | 73.3% |
| Handwritten Math | 5 / 10 | 50% |
Scores based on a single evaluation run · Methodology
View all legacy Vision Evals results →Claude Sonnet 4.6 costs $3.00 per 1M input tokens and $15.00 per 1M output tokens.
Pricing updated Jul 21, 2026
Estimated cost per task vs. Visual Understanding score, for this model and others ranked near it. Upper-left is the sweet spot (high quality, low cost). Based on Vision Evals (legacy) results.
11 of 11 models plotted
| Model | Score | Median tokens | Est. cost / task | Compare |
|---|---|---|---|---|
| Gemini 3.1 Pro | 75.8% | 1.1K | $0.0024 | Compare |
| Gemini 3 Flash | 74.6% | 1.4K | $0.0014 | Compare |
| GPT-5 Mini | 73.1% | 1.8K | $0.0006 | Compare |
| Qwen3.5 27B | 71.6% | 1.2K | $0.0003 | Compare |
| Claude Sonnet 5 | 70.2% | 2.2K | $0.0048 | Compare |
| Claude Sonnet 4.6(this model) | 70.2% | 2.3K | $0.0080 | — |
| GPT-5.6 Luna | 70.2% | 1.5K | $0.0017 | Compare |
| Gemini 2.5 Pro | 70.2% | 856 | $0.0060 | Compare |
| Gemini 3.1 Flash-Lite | 68.7% | 1.1K | $0.0003 | Compare |
| Gemma 4 26B A4B | 68.7% | 531 | $0.0001 | Compare |
| Qwen3.6 Plus | 68.7% | 1.6K | $0.0005 | Compare |
Other models worth comparing for similar use cases.
Other versions in the same family as Claude Sonnet 4.6.
License terms and commercial-use guidance for Claude Sonnet 4.6.
This model is proprietary. The author retains all rights, and use of the model is governed by their specific terms of service or license agreement.
Commercial use depends on the terms set by the model author. Most proprietary commercial models require a paid subscription, API key, or per-call billing. Check the provider’s pricing and terms-of-service for details.
License information is provided as a guide and is not legal advice.
Yes. Claude Sonnet 4.6 accepts image input, and on Roboflow's previous vision benchmark it passed 70.2% of visual understanding tasks (#19 of 77) and scored 81.7% on OCR. You can test it on your own image in the demo above.
Claude Sonnet 4.6 has not yet been evaluated on Roboflow's current Vision Evals. The results on this page are from the previous benchmark.
Yes. The demo on this page runs Claude Sonnet 4.6 in the free Roboflow Playground: upload an image and see results in seconds. A free account unlocks unlimited runs.