Anthropic

Claude Sonnet 5 API pricing.

Claude Sonnet 5 is Anthropic’s model on the API market, released 30 Jun 2026. Prices are per million tokens in USD, as last read from the price list.

$2.00Input / 1M
$10Output / 1M
1MContext
128KMax output
Capability scores
Epoch AI
Maths3 of 4 benchmarks63
Science and knowledge2 of 2 benchmarks61
CodingNot tested by Epoch
Reasoning and puzzles2 of 2 benchmarks35
Agents and long tasksNot tested by Epoch

Each bar is this model's score in that area. The white tick marks the best score any model Epoch has tested reaches there.

Epoch Capabilities Index
157
Range 154 to 160 · #26 of 271 models Epoch has scored
Maths
63average of 3 of 4 Epoch results
FrontierMath (tiers 1 to 3) (max)66%
FrontierMath (tier 4) (max)29%
OTIS Mock AIME (xhigh)95%
Science and knowledge
61average of 2 of 2 Epoch results
GPQA Diamond (xhigh)91%
SimpleQA Verified (max)34%
Reasoning and puzzles
35average of 2 of 2 Epoch results
Chess puzzles (max)45%
Mystery game puzzles (max)35%

The index combines many benchmarks into one general-capability score; the range is how sure Epoch is of the number. Each area score is this site's average of the model's Epoch results in that area, where 0 is what guessing would score and 100 is perfect. Compare every model, and value for money →

Source: Epoch AI, Capabilities & benchmarking (licensed CC BY 4.0). Data refreshed 2 November 2026. These are Epoch's own tests; other benchmark sites can rank models differently.

Cheaper models that come close
Our working on Epoch's index
  1. GLM-5.3-Flash · Z.ai (Zhipu AI)index 153.22 (4 below) · 99% cheaper
  2. DeepSeek V4 Flash 0731 · DeepSeekindex 154.94 (2 below) · 96% cheaper
  3. DeepSeek V4.1 Flash · DeepSeekindex 156.11 (1 below) · 96% cheaper
  4. Claude Haiku 5.5 · Anthropicindex 160.37 · 95% cheaper

Models within 5 points of Claude Sonnet 5 on Epoch's Capabilities Index that cost less, comparing a typical chat mix (three parts input to one part output). A few points of index is a small difference and says nothing about your task: a place to start testing, not a verdict. Capability against price for every model.

Specification
USD per million tokens
Provider
Anthropic
Model id
anthropic/claude-sonnet-5
Input
$2.00
Output
$10
Cached input
$0.20
Context window
1M tokens
Maximum output
128K tokens
Takes
text, image, file
Returns
text
Tool use
Yes
Reasoning
Yes
Released
30 Jun 2026
First tracked
17 Sept 2026

At $2.00 per million input tokens, Claude Sonnet 5 is dearer than 264 of the 340 models on the price list.

Price changes
Tracked since 17 Sept 2026

No price change has been recorded since tracking began on 17 Sept 2026. Prices are checked every six hours, and any change is listed here and on model changes.

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Other entries for this model
More from Anthropic
Cheapest input first
  1. Claude Haiku 5.5$0.10 in · $0.50 out
  2. Claude Haiku 4.5$1.00 in · $5.00 out
  3. Claude Sonnet 5.5$2.00 in · $10 out
  4. Claude Sonnet 4.6$3.00 in · $15 out
  5. Claude Sonnet 4.5$3.00 in · $15 out
  6. Claude Opus 5.5$4.00 in · $20 out
  7. Claude Opus 5$5.00 in · $25 out
  8. Claude Opus 4.8$5.00 in · $25 out

Prices and specifications come from OpenRouter’s catalogue, last read 2 Nov 2026. A provider’s own price may differ; how this is collected.