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Claude Opus 5.5 (low) vs GPT-6 Astra (high)

GPT-6 Astra (high) leads on average score with 9.9 vs 9.3. Claude Opus 5.5 (low) has the lower benchmark cost at $0.952 vs $3.474. GPT-6 Astra (high) is faster at 18.65s vs 23.72s, with pass rates of 87.9% vs 97.0%.

Last updated at: 2026-09-23

Compared models

Rank
#20
Total Output Tokens
21,004
Response Time (avg)
23.72s
Total Cost
$0.952
Rank
#5
Total Output Tokens
53,622
Response Time (avg)
18.65s
Total Cost
$3.474
Recommended model Claude Opus 5.5 (low)

Its score stays close to the best score here (9.3 vs 9.9), while costing about 3.7x less than GPT-6 Astra (high).

Detailed comparison

Metric Claude Opus 5.5 Claude Opus 5.5 low Release: 2026-09-23 GPT-6 Astra GPT-6 Astra high Release: 2026-09-04
Score 9.3 9.9
Rank #20 #5
Reliability 10.0 9.9
Consistency 9.3 9.6
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 87.9% 97.0%
Flaky tests 2 1
Total Runs 66 66
Cost per result 5.284 16.543
Total Cost $0.952 $3.474
Input Price $4.000 / 1M $10.000 / 1M
Output Price $20.000 / 1M $50.000 / 1M
Total Input Tokens 132,746 79,290
Output Tokens 6,454 4,847
Reasoning Tokens 14,550 48,775
Response Time (avg) 23.72s 18.65s
Response Time (max) 89.16s 254.93s
Response Time (total) 521.82s 410.28s
Parameters ~5T total (~500B active) ~2T total (~150B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#20 Claude Opus 5.5

low
Invalid SVG
Cost
$0.038
Time
19.1s
Tokens
2,010 tok

#5 GPT-6 Astra

high
Cost
$0.457
Time
176.7s
Tokens
9,218 tok

Top Models by Score

Score vs Total Cost

Response Time (avg)

Score vs Response Time (avg)

Total Output Tokens

Score vs Total Output Tokens

Category Breakdown

Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 5.5 10.0 10.0 100.0% 0 12.23s 10,608 575 2,777
GPT-6 Astra 10.0 10.0 100.0% 0 5.86s 7,302 392 2,387

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