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uxwizz.com
#38

Claude Opus 4.8

Anthropic Release: 2026-05-28 Tested on: 2026-06-30 22:08 anthropic/claude-opus-4.8::low
~5T total (~500B active)MoEClosedEstimated
(medium) (low) (none)

Summary

Claude Opus 4.8 scores 7.7 on AI BENCHY and ranks #38. It has 10.0 reliability, a 79.4% pass rate, $1.270 total cost, and 10.83s average response time.

What makes Claude Opus 4.8 unique: It stands out most in Puzzle Solving, where it ranks #1, while Coding is its weakest area at #18. It is notably fast compared with similar models.

Model facts

Researched on 2026-08-12

Estimated
Parameters
~5T total (~500B active)
Architecture
MoE
Availability
Closed
License
-

Best estimate from public evidence; the vendor did not disclose every value. External industry estimate; vendor has not disclosed the architecture.

Parameter source Availability source

Score

7.7

Consistency

8.8

Reliability

10.0

Total Cost (Current Price)

$1.270

Total Output Tokens

38,602

Total Input Tokens

60,946

Input Price

$5.000 / 1M

Output Price

$25.000 / 1M

Tests Correct

Wrong Tests: 6

Attempt pass rate: 79.4%

Flaky tests

3

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

Response Time (avg)

10.83s

Response Time (max): 127.97s

Response Time (total): 227.39s

Wrong answer: 4 Extra formatting: 1 No answer: 1

Hamster playing table tennis

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

#38 Claude Opus 4.8

low
Cost
$0.031
Time
14.1s
Tokens
1,345 tok

Run history

Tested on Score Reliability Tests Correct Total Cost Compare
2026-08-14 02:09 Re-test 7.8 10.0 $2.089 Compare
2026-07-16 22:30 New test added 7.8 10.0 $2.077 Compare
2026-06-30 22:08 Initial run 7.7 10.0 $1.270 Current run

Price History

Historical pricing data for this model from OpenRouter.

Date Input Price Output Price
2026-06-30 22:09 $5.000 / 1M $25.000 / 1M

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

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Category Breakdown

Category Score Consistency Tests Correct
Anti-AI Tricks 10.0 10.0
Coding 6.6 4.6
Combined 9.8 10.0
Data parsing and extraction 6.3 5.8
Domain specific 5.3 10.0
General Intelligence 10.0 10.0
Instructions following 9.8 10.0
Puzzle Solving 10.0 10.0
Tool Calling 10.0 10.0
Trivia 3.0 10.0

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