Anthropic: Claude Sonnet 4
Claude Sonnet 4 from Anthropic is an advanced AI capable of processing text, images, and files, with a context length of up to one million tokens, making it versatile for complex tasks. It supports reasoning and tools integration, enhancing its utility in problem-solving scenarios where structured output is not required. This model should be considered by those needing a robust solution that can handle diverse input modalities, but who may also require a cost-effective option within the budget of $3.0 per million input tokens and $15.0 per million output tokens. With a blended benchmark score of 57.8 across five independent evaluations, it offers solid performance for a variety of applications, making it a strong contender in the market.
Benchmark results
Independent, published benchmarks. Blended score 57.8 across 5 benchmarks, last refreshed 2026-08-13. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| Aider Polyglot | code editing across languages | 64.9 |
| AI Index | broad capability composite | 42.9 |
| AI Index Coding | software engineering tasks | 62.0 |
| AI Index Agentic | multi-step tool-using tasks | 29.0 |
| EQ-Bench | emotional understanding in dialogue | 66.6 |
- Model ID
- anthropic/claude-sonnet-4
- Vendor
- anthropic
- Released
- May 2025
- Tokenizer
- Claude
- Input Modalities
- image, text, file
- Output Modalities
- text
- Max Output
- 64,000 tokens
- Tool Calling
- ✓ supported
- Structured Output
- not supported
- Reasoning Mode
- ✓ supported
- Vision
- ✓ accepts images
- Audio
- no
- Moderated
- yes
What it costs in practice
Computed from the current $3.00/M input and $15.00/M output rates. Run your own numbers →
| Job | Tokens | Cost |
|---|---|---|
| Summarize a 50-page report | 30k in / 1.5k out | $0.11 |
| Classify 1,000 customer emails | 500k in / 50k out | $2.25 |
| A month of a busy support chatbot | 5M in / 2M out | $45.00 |
Similar models
Claude Opus 5
Anthropic: Claude Fable 5 (batch)
Anthropic: Claude Opus 4.8
Anthropic: Claude Opus 4.7
Anthropic: Claude Opus 4.6
Anthropic: Claude Opus 4.5
Quick answers
- How much does Anthropic: Claude Sonnet 4 cost?
- $3.00 per million input tokens and $15.00 per million output tokens.
- What is Anthropic: Claude Sonnet 4's context window?
- 1,000,000 tokens, roughly 1,500 pages of text in a single request.
- Does Anthropic: Claude Sonnet 4 support tool calling?
- It supports tool calling, a reasoning mode.
- Can Anthropic: Claude Sonnet 4 process images?
- Yes, it accepts image input.