Anthropic: Claude Sonnet 4
The Anthropic Claude Sonnet 4 is a large language model developed by Anthropic that can handle multiple input modalities, including images, text, and files. It has a massive context length of one million tokens, allowing it to process complex and lengthy inputs. For those on a budget or seeking a balance between cost and performance, the Claude Sonnet 4 may be worth shortlisting due to its relatively low price point, with $3 input per million tokens and $15 output per million tokens. Its blended benchmark score of 58.9 across three independent benchmarks is also a consideration, though it trails behind other models in some individual categories; however, it has yet to be tested by more benchmarks.
Benchmark results
Independent, published benchmarks. Blended score 58.2 across 3 benchmarks, last refreshed 2026-10-13. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| Aider Polyglot | code editing across languages | 64.9 |
| AI Index | broad capability composite | 27.4 |
| 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 |
Price & spec history
Tracked daily by PicksByModel since 2026-07-17.
| Date | Input /M | Output /M | Context |
|---|---|---|---|
| 2026-09-22 | $3.00 | $15.00 | 200,000 |
| 2026-07-17 | $3.00 | $15.00 | 1,000,000 |
Category rankings
Where Anthropic: Claude Sonnet 4 places across the 1 category it ranks in. How we rank →
| # | Category | Score |
|---|---|---|
| #21 | Browser AutomationAgents · of 25 ranked | 141 |
Similar models
Anthropic: Claude Fable 5.1 (batch)
Anthropic: Claude Opus 5
Anthropic: Claude Fable 5 (batch)
Anthropic: Claude Opus 4.8
Anthropic: Claude Opus 4.7
Anthropic: Claude Opus 4.6
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?
- 200,000 tokens, roughly 300 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.