Anthropic: Claude Sonnet 4
Analysis Summary
Claude Sonnet 4 is Anthropic's balanced model for reasoning, coding, and agentic workflows. It combines strong coding performance with a high agentic result, a 1M-token context window, vision, file input, tool use, and function calling. Instruction following and long-context results support careful production writing as well as technical work.
For Design for Online, it fits software engineering, codebase maintenance, autonomous task execution, long-document analysis, SEO strategy, and customer-facing content where consistency matters. The main limitation is cost, especially for output-heavy campaigns and routine transformations. It is also an earlier Sonnet generation, so newer benchmarked family models should receive preference when capability and pricing are comparable.
Adopt it for high-value client workflows, with a cheaper model handling volume operations.
Assessed August 9, 2026
Editorial notes
Claude Sonnet 4 combines strong coding and agentic performance with a million-token context, vision, file handling, and reliable instruction following. Its premium pricing favours complex engineering and client-facing work over bulk automation.
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
DFO Verdict
Claude Sonnet 4 combines strong coding and agentic performance with a million-token context, vision, file handling, and reliable instruction following. Its premium pricing favours complex engineering and client-facing work over bulk automation.
Benchmark scores
Magenta = intelligence · Ink = technical/agentic · Cyan = content & long-context · Grey = community benchmarks. Data: Artificial Analysis, Hugging Face.
28.9 Intelligence Index·37.6 Coding Index·47.8 Agentic Index·74.3 Math Index
How Anthropic: Claude Sonnet 4 compares
Anthropic: Claude Sonnet 4 ranks #126 of 420 AI models we track for overall intelligence, #91 of 193 for coding, #23 of 175 for agentic tasks. Its 1M-token context window is larger than 86% of the models we list. At $3.00 per million input tokens it is cheaper than 11% of comparable models.
Dark bar = input · light bar = output, scaled to the priciest peer.
1M tokens ≈ 8 full-length novels or ~2,500 pages of business documents in a single request.
Strongest on business fit. The pulled-in intelligence corner is the trade-off, and if the shape matters more than the price, this is your model.
Compare shapes side-by-side →Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $3.00 | $0.003000 |
| Output | $15.00 | $0.015000 |
What would Anthropic: Claude Sonnet 4 cost your business?
Pick the job that looks most like yours, then fine-tune with the sliders. Estimates update live.
A website chatbot handling around 100 customer conversations a day, a few short messages each.
Full calculator with 688 models → Price Calculator
These numbers get smaller with the right architecture.
We route routine calls to cheap models and save Anthropic: Claude Sonnet 4 for the hard ones. Most clients cut their estimate by 60-80%.
Talk to our teamAbout Anthropic: Claude Sonnet 4
Claude Sonnet 4 significantly enhances the capabilities of its predecessor, Sonnet 3.7, excelling in both coding and reasoning tasks with improved precision and controllability. Achieving state-of-the-art performance on SWE-bench (72.7%),..
Frequently asked questions about Anthropic: Claude Sonnet 4
How much does Anthropic: Claude Sonnet 4 cost?
Anthropic: Claude Sonnet 4 costs $3.00 per million input tokens and $15.00 per million output tokens.
What is the context window of Anthropic: Claude Sonnet 4?
Anthropic: Claude Sonnet 4 has a context window of 1,000,000 tokens (1M).
Is Anthropic: Claude Sonnet 4 good for coding?
On our coding benchmark index, Anthropic: Claude Sonnet 4 ranks #91 of 193 models, placing it in the broader range of the field for code generation and debugging.
What can Anthropic: Claude Sonnet 4 do?
Anthropic: Claude Sonnet 4 supports image/vision input, tool use, and function calling.
Who created Anthropic: Claude Sonnet 4?
Anthropic: Claude Sonnet 4 is developed by Anthropic and was released on May 22, 2025.
