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Claude Opus 4.8 (medium) vs GPT-5.6 Terra (high)

GPT-5.6 Terra (high) leads on average score with 8.3 vs 8.3. GPT-5.6 Terra (high) has the lower benchmark cost at $1.116 vs $3.490. GPT-5.6 Terra (high) is faster at 13.62s vs 16.72s, with pass rates of 82.6% vs 69.6%.

Last updated at: 2026-10-01

Compared models

Rank
#80
Total Output Tokens
67,842
Response Time (avg)
16.72s
Total Cost
$3.490
Rank
#76
Total Output Tokens
60,065
Response Time (avg)
13.62s
Total Cost
$1.116
Recommended model GPT-5.6 Terra (high)

It has the best score here (8.3), while costing about 3.1x less than Claude Opus 4.8 (medium).

Detailed comparison

Metric Claude Opus 4.8 Claude Opus 4.8 medium Release: 2026-05-28 GPT-5.6 Terra GPT-5.6 Terra high Release: 2026-07-09
Score 8.3 8.3
Rank #80 #76
Reliability 10.0 10.0
Consistency 9.0 9.4
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 82.6% 69.6%
Flaky tests 3 2
Total Runs 69 69
Cost per result 20.527 8.674
Total Cost $3.490 $1.116
Input Price $5.000 / 1M $2.000 / 1M
Output Price $25.000 / 1M $12.000 / 1M
Total Input Tokens 360,294 197,239
Output Tokens 43,441 6,083
Reasoning Tokens 24,401 53,982
Response Time (avg) 16.72s 13.62s
Response Time (max) 99.37s 91.49s
Response Time (total) 384.66s 313.21s
Parameters ~5T total (~500B active) ~1T total (~60B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#80 Claude Opus 4.8

medium
Cost
$0.057
Time
23.1s
Tokens
2,412 tok

#76 GPT-5.6 Terra

high
Cost
$0.055
Time
30.2s
Tokens
3,748 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 4.8 10.0 10.0 100.0% 0 15.33s 10,590 9,945 1,381
GPT-5.6 Terra 7.6 7.2 77.8% 1 9.14s 7,302 370 6,087

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