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uxwizz.com
#266

Claude Sonnet 5.5

Anthropic Release: 2026-09-29 Tested on: 2026-09-29 21:35 anthropic/claude-sonnet-5.5::medium
~1T total (~100B active)MoEClosedEstimated
(max) (xhigh) (high) (medium) (low)

Summary

Claude Sonnet 5.5 scores 5.7 on AI BENCHY and ranks #266. It has 10.0 reliability, a 37.9% pass rate, $0.672 total cost, and 6.07s average response time.

What makes Claude Sonnet 5.5 unique: It stands out most in Combined, where it ranks #1, while Coding is its weakest area at #14.

Model facts

Researched on 2026-09-29

Estimated
Parameters
~1T total (~100B active)
Architecture
MoE
Availability
Closed
License
-

Best estimate from public evidence; the vendor did not disclose every value. Vendor does not disclose parameter counts or architecture. Low-confidence catalog estimates carry forward the prior Claude Sonnet 5 family estimates; the announcement establishes identity and API availability, not these counts. Thinking is always on; OpenRouter lists low, medium, high, xhigh, and max efforts.

Parameter source Availability source

Score

5.7

Consistency

9.7

Reliability

10.0

Total Cost (Current Price)

$0.672

Total Output Tokens

32,980

Total Input Tokens

170,771

Input Price

$2.000 / 1M

Output Price

$10.000 / 1M

Tests Correct

Wrong Tests: 14

Attempt pass rate: 37.9%

Flaky tests

1

Flaky tests had mixed outcomes across runs (at least one pass and one fail).

Response Time (avg)

6.07s

Response Time (max): 26.16s

Response Time (total): 133.62s

Extra formatting: 8 Did not follow instructions: 3 Invalid tool call: 1 No answer: 1 Wrong answer: 1

Hamster playing table tennis

Prompt: Create a detailed SVG illustration of a hamster playing table tennis.

#266 Claude Sonnet 5.5

medium
Cost
$0.024
Time
17.4s
Tokens
2,525 tok

Charts

Choose the first model, then click a second model to open a side-by-side page.

Total Output Tokens

Score vs Total Output Tokens

Quick Compare

Claude Sonnet 5.5mediumvsNorth Mini CodemediumFree AvailableClaude Sonnet 5.5mediumvsNemotron 3 SupermediumFree AvailableClaude Sonnet 5.5mediumvsSolar Pro 4noneClaude Sonnet 5.5mediumvsGLM 5noneClaude Sonnet 5.5mediumvsGPT-5.4noneClaude Sonnet 5.5mediumvsInkling SmalllowClaude Sonnet 5.5mediumvsSpace Bunny AlphalowClaude Sonnet 5.5mediumvsLing-3.0-flashnoneClaude Sonnet 5.5mediumvsSeed 2.1 TurbononeClaude Sonnet 5.5mediumvsGLM 5.1none

Category Breakdown

Category Score Consistency Tests Correct
Anti-AI Tricks 6.5 10.0
Coding 3.4 9.7
Combined 8.5 10.0
Data parsing and extraction 6.5 10.0
Domain specific 3.0 10.0
General Intelligence 5.1 3.4
Instructions following 6.3 10.0
Puzzle Solving 7.7 10.0
Tool Calling 10.0 10.0
Trivia 3.0 10.0

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