How much does Claude Sonnet 4 cost?

Claude Sonnet 4 costs $3.00 per million input tokens and $15.00 per million output tokens, using the median price across hosting providers as of 26 Oct 2026. That is about $1.05 for 100 chats of about 1,000 tokens in and 500 tokens back. Confirm on the maker's site before you buy, because prices change.

What is the context window of Claude Sonnet 4?

Claude Sonnet 4 has a context window of 200K tokens, roughly 150,000 words of text read at once. A single answer can be up to 64K tokens long.

Is Claude Sonnet 4 open source?

We list Claude Sonnet 4 as closed: it is used through its maker's apps or API and its weights are not published (Epoch AI lists its access as "API access").

How good is Claude Sonnet 4 compared with other AI models?

On the Epoch Capabilities Index, Claude Sonnet 4 scores 141.6 (likely range 139.0 to 143.1), which ranks 113 of 270 models we track. On Arena's human-vote text board it is ranked 102 of 166. Scores close together are a tie in practice.

How does Claude Sonnet 4 compare with Gemini 2.5 Flash (May 2025)?

Claude Sonnet 4 scores higher on 2 of 5 shared quality measures, Gemini 2.5 Flash (May 2025) on 1. 2 measures are too close to call. See the full comparison for every measure.

How current are these numbers for Claude Sonnet 4?

The newest data on this page is dated 26 Oct 2026. Scores come from Epoch AI and Arena, prices from the open LiteLLM price list.

AI Rankings

Claude Sonnet 4: Score, Price and Context Window

Where Claude Sonnet 4 from Anthropic ranks, what it costs and how much text it can read, in plain numbers with the sources.

Data updated 26 Oct 2026

Anthropic
Closed weights
Released May 2025

Its score range overlaps with o1, the model just above it, so a small gap in rank is not a meaningful difference.

Skip if

Tight budgets: it is among the priciest quarter of models in the top half by score.

These lines are worked out from the numbers on this page, not from hands-on testing.

Key facts

Overall score: 141.6; Rank 113 of 270. Likely range 139.0 to 143.1.
Human preference: chat: 1402; Rank 102 of 166. 34,135 votes, at the "Thinking 32K" setting.
Human preference: coding: 1474; Rank 85 of 166. 6,344 votes, at the "Thinking 32K" setting.
Human preference: images: 1207; Rank 63 of 85. 1,144 votes, at the "Thinking 32K" setting.
Price per million tokens: $3.00 in / $15.00 out; Blended $6.00. Cached input $0.30. Median across hosting providers, checked 26 Oct 2026.
Context window: 200K tokens; About 150,000 words at once. One answer up to 64K tokens.
Weights: Closed; Used through the maker's apps or API (Epoch AI: API access).

Features listed by the price list: Image input, Tool use, Reasoning, Prompt caching, Structured output.

Try itClaude in our AI tools directoryAnthropic's AI assistant for research, writing, code, files, and connected tasks, with free and paid plans.

How Claude Sonnet 4 stacks up

Each strip shows every model we track as faint bars. The dot is this model. Better is always to the right, even for price.

Claude Sonnet 4 compared with all models we trackOverall capability: 141.6. Better than 58% of the other 269 models. Human preference: chat: 1402. Better than 38% of the other 165 models. Human preference: coding: 1474. Better than 49% of the other 165 models. Human preference: images: 1207. Better than 26% of the other 84 models. Price: $6.00 per 1M. Cheaper than 12% of the other 200 priced models. Context window: 200K tokens. Larger context window than 39% of the other 198 models.

Overall capability141.6
Better than 58% of the other 269 modelsUpper half
Epoch Capabilities Index: one score that combines many tests.
Human preference: chat1402
Better than 38% of the other 165 models
How often people pick its answers over another model's on Arena.
Human preference: coding1474
Better than 49% of the other 165 models
How often people pick its answers to coding questions on Arena.
Human preference: images1207
Better than 26% of the other 84 models
How often people pick its answers about pictures on Arena.
Price$6.00 per 1M
Cheaper than 12% of the other 200 priced models
Blended price per million tokens. Lower is better, so the cheapest models sit on the right.
Context window200K tokens
Larger context window than 39% of the other 198 models
How much text it can read at once. Bigger suits long documents.

Compared with the other published models that have each measure. Data updated 26 Oct 2026.

Where Claude Sonnet 4 ranks

Leaderboards it appears on, best placing first.

See all leaderboards

Test results

Each test checks one kind of skill. Place shows where it stands among the models that took that test.

Aider Polyglot
225 coding exercises in six programming languages. The AI edits the code files and the exercise's tests decide pass or fail.
61.3%
Place 15 of 46
GPQA Diamond
Very hard multiple-choice science questions in biology, physics and chemistry, written by experts and designed so a quick web search does not give the answer.
79.2%
Place 88 of 183
OTIS Mock AIME
Maths competition problems in the style of the US AIME exam, from the 2024 and 2025 sets. Every answer is a whole number.
71.1%
Place 95 of 174
tied with 2 others
SimpleBench
Everyday common-sense and trick questions that most people answer correctly but AI models often get wrong.
45.5%
Place 47 of 80
ARC-AGI-2
Visual puzzles where the AI must work out a new rule from a few examples and apply it. They test picking up a new idea quickly, not recalling facts.
5.9%
Place 56 of 86
Humanity's Last Exam
A large set of very hard, expert-written questions across many subjects, built to stay difficult for top AI models.
7.8%
Place 33 of 41

What it costs in everyday terms

List prices turned into amounts you can picture. Real bills depend on how you use it.

100 chats: $1.05; Cost of 100 chats assumes each chat sends 1,000 tokens (about 750 words) and gets 500 tokens (about 375 words) back.
A 300-page book: $0.30; Cost to read a 300-page book assumes about 100,000 input tokens and no reply. A real book varies with page size and language.
Blended price: $6.00 per 1M; Three parts input to one part output. Our own calculation for comparing models.

Similar models

Models from other makers with a similar overall score.

Learn more

Questions about Claude Sonnet 4

How much does Claude Sonnet 4 cost?: Claude Sonnet 4 costs $3.00 per million input tokens and $15.00 per million output tokens, using the median price across hosting providers as of 26 Oct 2026. That is about $1.05 for 100 chats of about 1,000 tokens in and 500 tokens back. Confirm on the maker's site before you buy, because prices change.
What is the context window of Claude Sonnet 4?: Claude Sonnet 4 has a context window of 200K tokens, roughly 150,000 words of text read at once. A single answer can be up to 64K tokens long.
Is Claude Sonnet 4 open source?: We list Claude Sonnet 4 as closed: it is used through its maker's apps or API and its weights are not published (Epoch AI lists its access as "API access").
How good is Claude Sonnet 4 compared with other AI models?: On the Epoch Capabilities Index, Claude Sonnet 4 scores 141.6 (likely range 139.0 to 143.1), which ranks 113 of 270 models we track. On Arena's human-vote text board it is ranked 102 of 166. Scores close together are a tie in practice.
How does Claude Sonnet 4 compare with Gemini 2.5 Flash (May 2025)?: Claude Sonnet 4 scores higher on 2 of 5 shared quality measures, Gemini 2.5 Flash (May 2025) on 1. 2 measures are too close to call. See the full comparison for every measure.
How current are these numbers for Claude Sonnet 4?: The newest data on this page is dated 26 Oct 2026. Scores come from Epoch AI and Arena, prices from the open LiteLLM price list.

Where this data comes from

Epoch AI: Benchmark data: Epoch AI, 'Capabilities & benchmarking', epoch.ai/benchmarks (CC BY 4.0). We match models across sources, rank them and show them in charts. Scores are not changed. Epoch AI does not endorse this site.
Arena (formerly LMArena): Human-preference ratings: Arena (arena.ai) leaderboard dataset, CC BY 4.0. We keep the latest published ratings, match them to models from other sources and rank them. Ratings are not changed. Arena does not endorse this site.
LiteLLM model price list: Prices and context windows: LiteLLM model price list (github.com/BerriAI/litellm, MIT licence). We use the model maker's own price entry when there is one. Prices change often, so always confirm on the maker's site before you buy.

Newest data on this page: 26 Oct 2026. Prices are list prices and change often, so confirm on the maker's site before you buy. Sponsors never change a score or an order. How we calculate this · Report a mistake