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

GPT-5.6 Terra (medium) leads on average score with 8.2 vs 7.2. GPT-5.6 Terra (medium) has the lower benchmark cost at $0.483 vs $3.787. GPT-5.6 Terra (medium) is faster at 8.93s vs 17.13s, with pass rates of 78.3% vs 71.0%.

Last updated at: 2026-10-19

Compared models

Rank
#172
Total Output Tokens
69,489
Response Time (avg)
17.13s
Total Cost
$3.787
Rank
#103
Total Output Tokens
33,189
Response Time (avg)
8.93s
Total Cost
$0.483
Recommended model GPT-5.6 Terra (medium)

It has the best score here (8.2), while costing about 7.9x less than Claude Opus 4.8 (low).

Detailed comparison

Metric Claude Opus 4.8 Claude Opus 4.8 low Release: 2026-05-28 GPT-5.6 Terra GPT-5.6 Terra medium Release: 2026-07-09
Score 7.2 8.2
Rank #172 #103
Reliability 10.0 10.0
Consistency 8.6 9.3
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 78.3% 71.0%
Flaky tests 4 2
Total Runs 69 69
Cost per result 23.669 5.768
Total Cost $3.787 $0.483
Input Price $5.000 / 1M $2.000 / 1M
Output Price $25.000 / 1M $12.000 / 1M
Cache Read Price $0.500 / 1M $0.200 / 1M
Cache Write Price $6.250 / 1M $2.500 / 1M
Total Input Tokens 409,947 172,507
Output Tokens 46,060 5,824
Reasoning Tokens 23,429 27,365
Response Time (avg) 17.13s 8.93s
Response Time (max) 127.97s 54.74s
Response Time (total) 394.01s 205.39s
Parameters ~5T total (~500B active) ~1T total (~60B active)
Availability Closed Closed

Cache prices apply to input tokens. Reads reuse cached prompts; writes store them and can cost extra. Output tokens use the output price.

Model generation showcase

Hamster playing table tennis

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

#172 Claude Opus 4.8

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

#103 GPT-5.6 Terra

medium
Cost
$0.035
Time
16.3s
Tokens
2,418 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 6.6 4.6 77.8% 2 7.58s 10,590 3,637 809
GPT-5.6 Terra 6.1 7.2 55.6% 1 7.19s 7,302 427 4,527

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