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Claude Opus 5.5 (low) vs GPT-6.1 Terra (xhigh)

Claude Opus 5.5 (low) leads on average score with 9.4 vs 9.3. GPT-6.1 Terra (xhigh) has the lower benchmark cost at $0.789 vs $1.733. GPT-6.1 Terra (xhigh) is faster at 23.65s vs 25.68s, with pass rates of 88.4% vs 88.4%.

Last updated at: 2026-10-26

Compared models

Rank
#26
Total Output Tokens
25,006
Response Time (avg)
25.68s
Total Cost
$1.733
Rank
#32
Total Output Tokens
121,002
Response Time (avg)
23.65s
Total Cost
$0.789
Recommended model GPT-6.1 Terra (xhigh)

Its score stays close to the best score here (9.3 vs 9.4), while costing about 2.2x less than Claude Opus 5.5 (low).

Detailed comparison

Metric Claude Opus 5.5 Claude Opus 5.5 low Release: 2026-09-23 GPT-6.1 Terra GPT-6.1 Terra xhigh Release: 2026-10-26
Score 9.4 9.3
Rank #26 #32
Reliability 10.0 10.0
Consistency 9.3 8.6
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 88.4% 88.4%
Flaky tests 2 4
Total Runs 69 69
Cost per result 9.118 4.379
Total Cost $1.733 $0.789
Input Price $4.000 / 1M $1.000 / 1M
Output Price $20.000 / 1M $5.000 / 1M
Cache Read Price $0.200 / 1M $0.050 / 1M
Cache Write Price $5.000 / 1M $1.250 / 1M
Total Input Tokens 308,056 183,057
Output Tokens 9,434 5,490
Reasoning Tokens 15,572 115,512
Response Time (avg) 25.68s 23.65s
Response Time (max) 89.16s 236.28s
Response Time (total) 590.71s 543.86s
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.

#26 Claude Opus 5.5

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

#32 GPT-6.1 Terra

xhigh
Cost
$0.050
Time
109.1s
Tokens
9,926 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-6.1 Terra 10.0 10.0 100.0% 0 15.91s 7,302 387 11,030

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