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Claude Fable 5.1 (medium) vs GPT-5 Mini (medium)

Claude Fable 5.1 (medium) leads on average score with 8.3 vs 8.1. GPT-5 Mini (medium) has the lower benchmark cost at $0.241 vs $2.909. Claude Fable 5.1 (medium) is faster at 11.67s vs 27.64s, with pass rates of 81.8% vs 65.2%.

Last updated at: 2026-09-02

Rank
#48
Total Output Tokens
31,152
Response Time (avg)
11.67s
Total Cost
$2.909
Rank
#52
Total Output Tokens
108,019
Response Time (avg)
27.64s
Total Cost
$0.241
Recommended model GPT-5 Mini (medium)

Its score stays close to the best score here (8.1 vs 8.3), while costing about 12.1x less than Claude Fable 5.1 (medium).

Detailed comparison

Metric Claude Fable 5.1 Claude Fable 5.1 medium Release: 2026-09-02 GPT-5 Mini GPT-5 Mini medium Release: 2025-08-07
Score 8.3 8.1
Rank #48 #52
Reliability 10.0 10.0
Consistency 7.8 8.4
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 81.8% 65.2%
Flaky tests 6 4
Total Runs 66 66
Cost per result 19.392 2.006
Total Cost $2.909 $0.241
Input Price $10.000 / 1M $0.250 / 1M
Output Price $50.000 / 1M $2.000 / 1M
Total Input Tokens 135,112 98,383
Output Tokens 7,594 14,409
Reasoning Tokens 23,558 93,610
Response Time (avg) 11.67s 27.64s
Response Time (max) 36.59s 111.48s
Response Time (total) 256.73s 608.02s
Parameters ~9.5T total (~878B active) ~400B total (~17B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#48 Claude Fable 5.1

medium
Cost
$0.244
Time
65.9s
Tokens
5,025 tok

#52 GPT-5 Mini

medium
Cost
$0.007
Time
42.9s
Tokens
3,432 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 5.1 7.0 5.0 77.8% 2 10.99s 10,608 525 4,376
GPT-5 Mini 10.0 10.0 100.0% 0 27.63s 7,302 658 17,152

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