An
claude-sonnet-5 Benchmark & Insights
Anthropic Claude API
Updated Jul 31, 2026 All models
Sample size
170 runs
in window
Accuracy
91.0%
consensus match · 177d
Confidence
85%
over 179 runs
Window end
Jul 31, 2026
most recent run
Input price
$2.00/MTok
prompt tokens
Output price
$10.00/MTok
completion tokens
Model insights
- 01 Never overrates — every one of its sixteen misses is a step down, almost always "low" on a "medium" day.
- 02 That makes it calm but systematically soft.
- 03 At its current price it is both cheaper and far better calibrated than Sonnet 4.6, which had the opposite problem.
Notes
Introductory pricing of $2/$10 per million input/output tokens is in effect through August 31, 2026, after which the standard pricing of $3/$15 per million input/output tokens will take effect.
Recent forecasts