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Claude Fable 5.2 (xhigh) vs GPT-6.1 Terra (medium)

Claude Fable 5.2 (xhigh) leads on average score with 9.6 vs 9.6. GPT-6.1 Terra (medium) has the lower benchmark cost at $0.291 vs $10.319. GPT-6.1 Terra (medium) is faster at 7.99s vs 33.44s, with pass rates of 94.2% vs 91.3%.

Last updated at: 2026-11-10

Compared models

Rank
#13
Total Output Tokens
188,726
Response Time (avg)
33.44s
Total Cost
$10.319
Rank
#18
Total Output Tokens
24,483
Response Time (avg)
7.99s
Total Cost
$0.291
Recommended model GPT-6.1 Terra (medium)

Its score stays close to the best score here (9.6 vs 9.6), while costing about 35.6x less than Claude Fable 5.2 (xhigh).

Detailed comparison

Metric Claude Fable 5.2 Claude Fable 5.2 xhigh Release: 2026-11-09 GPT-6.1 Terra GPT-6.1 Terra medium Release: 2026-10-26
Score 9.6 9.6
Rank #13 #18
Reliability 9.2 10.0
Consistency 9.6 9.4
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 94.2% 91.3%
Flaky tests 1 2
Total Runs 69 69
Cost per result 49.137 1.452
Total Cost $10.319 $0.291
Input Price $8.000 / 1M $1.000 / 1M
Output Price $40.000 / 1M $5.000 / 1M
Cache Read Price $0.200 / 1M $0.050 / 1M
Cache Write Price $10.000 / 1M $1.250 / 1M
Total Input Tokens 346,216 167,830
Output Tokens 10,245 5,292
Reasoning Tokens 178,481 19,191
Response Time (avg) 33.44s 7.99s
Response Time (max) 440.05s 44.91s
Response Time (total) 769.21s 183.79s
Parameters ~9.5T total (~878B 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.

#13 Claude Fable 5.2

xhigh
Reached the allocated time limit (600 seconds) without receiving showcase output.
Cost
$0.000
Time
600.0s
Tokens
0 tok

#18 GPT-6.1 Terra

medium
Cost
$0.018
Time
39.1s
Tokens
3,537 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 Fable 5.2 10.0 10.0 100.0% 0 12.97s 10,608 553 9,868
GPT-6.1 Terra 10.0 10.0 100.0% 0 5.32s 7,302 387 2,250

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