Claude Sonnet 5
The successor to Sonnet 4.6, approaching Opus 4.8 on reasoning, tool use and coding, with adaptive thinking that adjusts reasoning depth per task.
Key Specifications
- Context window
- 1M tokens
- Max output
- 128K tokens
- Knowledge cutoff
- web search available
- Released
- Inputs
- Text, image
- Capabilities Show details
- Reasoning Thinks before it answers, always on or as a switchable mode. Function calling Connect to external tools, APIs, and systems. Structured output Return responses in structured formats like JSON. Web search Search the web for up-to-date information. Code execution Write and execute code in a sandboxed environment. File upload Process uploaded documents, spreadsheets, and other files. MCP Connect to services via Model Context Protocol.
Hosted API pricing
| Provider | Input / 1M tokens | Output / 1M tokens | Cost at 10M in + 2M out | |
|---|---|---|---|---|
|
Anthropic
Creator
|
$2.00 | $10.00 | $40.00 | View |
Replicate
|
$2.00 | $10.00 | $40.00 | View |
Heads up: Prices are estimates using base-tier, on-demand rates per 1M tokens from published pages; cached, batch and long-context tiers are shown only where listed. Providers may serve a shorter context or a quantized build than the creator's release. Verify with the provider before provisioning. How we estimate costs.
Similarly priced models
The models nearest Claude Sonnet 5 by blended rate, five each way, each at its own cheapest provider.
| Model | Blended / 1M | Input / 1M | Output / 1M | Context | Cutoff | vs Claude Sonnet 5 |
|---|---|---|---|---|---|---|
GPT-5.1
OpenAI
|
$2.71 | $1.25 | $10.00 | 400K | Sep 2024 | −19% |
Gemini 3.5 Flash
Google Cloud
|
$2.75 | $1.50 | $9.00 | 1M | −17% | |
|
GPT-4.1
OpenAI
|
$3.00 | $2.00 | $8.00 | 1M | Jun 2024 | −10% |
|
o3
OpenAI
|
$3.00 | $2.00 | $8.00 | 200K | Jun 2024 | −10% |
Qwen3.8-2.4T-A95B
Alibaba Cloud
|
$3.13 | $2.50 | $6.25 | 262K | −6% | |
|
Claude Sonnet 5
This model
Anthropic
|
$3.33 | $2.00 | $10.00 | 1M | Jan 2026 | |
|
Gemini 3.1 Pro Preview
Google Cloud
|
$3.67 | $2.00 | $12.00 | 1M | Jan 2025 | +10% |
|
GPT-5.6 Terra
OpenAI
|
$3.67 | $2.00 | $12.00 | 1M | Feb 2026 | +10% |
Command A
Cohere
|
$3.75 | $2.50 | $10.00 | 256K | +13% | |
|
GPT-5.2
OpenAI
|
$3.79 | $1.75 | $14.00 | 400K | Aug 2025 | +14% |
|
GPT-5.3-Codex
OpenAI
|
$3.79 | $1.75 | $14.00 | 400K | Aug 2025 | +14% |
Prices are USD per 1M tokens at each model's cheapest listed provider. Blended is the cost of 10M input plus 2M output tokens, spread over the 12M.
Frequently Asked Questions
What is Claude Sonnet 5 good for?
Reasoning, tool use and coding. It costs less than the other current Sonnets and much less than Claude Fable 5, one tier above Haiku 4.5.
When is Claude Sonnet 5 not a good fit?
Audio or video input, or output other than text. Work that needs knowledge past January 2026, where Opus 5 has a May 2026 cutoff. Closed weights, so no self-hosting.
What is the cheapest way to run Claude Sonnet 5?
The cheapest hosted rate is $2.00 / $10.00 per 1M tokens via Anthropic.
How does Claude Sonnet 5 compare with Claude Sonnet 4.6?
Anthropic says Claude Sonnet 5 is a substantial step up from Claude Sonnet 4.6 in reasoning, tool use, coding and knowledge work, finishing tasks where earlier Sonnets stopped short and checking its own output unasked. It uses a new tokenizer and hallucinates less. Same 1M-token context and text and image input. Claude Sonnet 5 lists at 33% less per 1M input tokens and 33% less per 1M output tokens than Claude Sonnet 4.6. It came out 4 months later and has a newer knowledge cutoff (January 2026 against August 2025).
Can I self-host Claude Sonnet 5?
No. Anthropic does not publish the weights; Claude Sonnet 5 is available only through hosted APIs.
More from Anthropic
| Model | Context | Input / 1M | Output / 1M |
|---|---|---|---|
|
Claude Sonnet 4.6
|
1M | $3.00 | $15.00 |
|
Claude Sonnet 4
|
200K | $3.00 | $15.00 |
|
Claude Sonnet 4.5
|
200K | $3.00 | $15.00 |
|
Claude Haiku 4.5
|
200K | $1.00 | $5.00 |
|
Claude Opus 5
|
1M | $5.00 | $25.00 |
|
Claude Opus 4.7
|
1M | $5.00 | $25.00 |
|
Claude Opus 4.8
|
1M | $5.00 | $25.00 |
|
Claude Opus 4.6
|
1M | $5.00 | $25.00 |