Model Library
AnthropicReleased February 17, 2026Claude Sonnet 4.6 (max)
Anthropic · Released February 17, 2026
Intelligence score
47
At a glance
- Intelligence
- 47
- Speed
- 71.0tokens/sec
- Latency
- 137.72stime to first token
- Input price
- $3.00per 1M tokens
- Output price
- $15.00per 1M tokens
- Context window
- 5tokens
- Parameters
- —
Summary
Comparison summary
Claude Sonnet 4.6 (Adaptive Reasoning, Max Effort) scores 47 on the Artificial Analysis Intelligence Index, placing it well above average among other reasoning models in a similar price tier (median: 28). Claude Sonnet 4.6 (Adaptive Reasoning, Max Effort) generates output at 71.0 tokens per second (based on Anthropic's API), which is below average compared to other reasoning models in a similar price tier (median: 81.2 t/s). Claude Sonnet 4.6 (Adaptive Reasoning, Max Effort) costs $3.00 per 1M input tokens (somewhat higher than average, median: $1.50) and $15.00 per 1M output tokens (somewhat higher than average, median: $8.40), based on Anthropic's API.
Specifications
Technical specifications
| Model name | Claude Sonnet 4.6 (max) |
|---|---|
| Provider | Anthropic |
| Release date | February 17, 2026 |
| Intelligence score | 47 |
| Speed | 71.0 tokens/sec |
| Latency (TTFT) | 137.72s |
| Input price | $3.00 / 1M tokens |
| Output price | $15.00 / 1M tokens |
| Context window | 5 tokens |
| Parameters | — |
| Reasoning | Yes |
| Input modalities | text, image |
| Output modalities | — |
| Open weights | No |
| License | — |
| API availability | — |
| Source | Model Intelligence legacy profile: claude-sonnet-4-6-adaptive |
Pricing
Token prices
Price per 1M tokens
Claude Sonnet 4.6 (max), as listed in the catalog record
- Input$3.00
- Output$15.00
| Token type | Price per 1M |
|---|---|
| Input | $3.00 |
| Output | $15.00 |
Model Intelligence legacy profile: claude-sonnet-4-6-adaptive
FAQ · 19
Frequently asked questions
Claude Sonnet 4.6 (Adaptive Reasoning, Max Effort) was released on February 17, 2026.
Claude Sonnet 4.6 (Adaptive Reasoning, Max Effort) was created by Anthropic.
Claude Sonnet 4.6 (Adaptive Reasoning, Max Effort) scores 47 on the Artificial Analysis Intelligence Index, placing it well above average among other reasoning models in a similar price tier (median: 28).
Claude Sonnet 4.6 (Adaptive Reasoning, Max Effort) generates output at 71.0 tokens per second (based on Anthropic's API), which is below average compared to other reasoning models in a similar price tier (median: 81.2 t/s).
Claude Sonnet 4.6 (Adaptive Reasoning, Max Effort) has a time to first token (TTFT) of 137.72s (based on Anthropic's API), which is at the higher end compared to other reasoning models in a similar price tier (median: 2.77s).
Claude Sonnet 4.6 (Adaptive Reasoning, Max Effort) costs $3.00 per 1M input tokens (somewhat higher than average, median: $1.50) and $15.00 per 1M output tokens (somewhat higher than average, median: $8.40), based on Anthropic's API.
Claude Sonnet 4.6 (Adaptive Reasoning, Max Effort) costs $3.00 per 1M input tokens and $15.00 per 1M output tokens (based on Anthropic's API). For a blended rate (7:2:1 cache hit/input/output ratio), this is $2.31 per 1M tokens. Pricing may vary by provider.
When evaluated on the Intelligence Index, Claude Sonnet 4.6 (Adaptive Reasoning, Max Effort) generated 200M output tokens, which is at the higher end compared to other reasoning models in a similar price tier (median: 72M).
Yes, Claude Sonnet 4.6 (Adaptive Reasoning, Max Effort) is a reasoning model. It uses extended thinking or chain-of-thought reasoning to work through complex problems before providing an answer.
Claude Sonnet 4.6 (Adaptive Reasoning, Max Effort) supports text and image input.
Claude Sonnet 4.6 (Adaptive Reasoning, Max Effort) supports text output.
Yes, Claude Sonnet 4.6 (Adaptive Reasoning, Max Effort) supports image input and can analyze, describe, and answer questions about images.
Yes, Claude Sonnet 4.6 (Adaptive Reasoning, Max Effort) is multimodal. It can process text and image input and generate text output.
Claude Sonnet 4.6 (Adaptive Reasoning, Max Effort) has a context window of 1.0M tokens. This determines how much text and conversation history the model can process in a single request.
No, Claude Sonnet 4.6 (Adaptive Reasoning, Max Effort) is proprietary. The model weights are not publicly available.
Claude Sonnet 4.6 (Adaptive Reasoning, Max Effort) is a proprietary model and Anthropic has not disclosed the model size or parameter count.
Claude Sonnet 4.6 (Adaptive Reasoning, Max Effort) achieves a score of 47 on the Artificial Analysis Intelligence Index. This composite benchmark evaluates models across reasoning, knowledge, mathematics, and coding.
Yes, Claude Sonnet 4.6 (Adaptive Reasoning, Max Effort) is available via API through 4 providers.
Claude Sonnet 4.6 (Adaptive Reasoning, Max Effort) is available through 4 API providers.