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Claude Fable 5.1 (medium) vs GPT-5.2 (medium)

GPT-5.2 (medium) leads on average score with 8.4 vs 8.3. GPT-5.2 (medium) has the lower benchmark cost at $1.182 vs $2.909. Claude Fable 5.1 (medium) is faster at 11.67s vs 28.51s, with pass rates of 81.8% vs 72.7%.

Last updated at: 2026-09-02

Rank
#48
Total Output Tokens
31,152
Response Time (avg)
11.67s
Total Cost
$2.909
Rank
#43
Total Output Tokens
71,252
Response Time (avg)
28.51s
Total Cost
$1.182
Recommended model GPT-5.2 (medium)

It has the best score here (8.4), while costing about 2.5x less than Claude Fable 5.1 (medium).

Detailed comparison

Metric Claude Fable 5.1 Claude Fable 5.1 medium Release: 2026-09-02 GPT-5.2 GPT-5.2 medium Release: 2025-12-11
Score 8.3 8.4
Rank #48 #43
Reliability 10.0 10.0
Consistency 7.8 8.5
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 81.8% 72.7%
Flaky tests 6 4
Total Runs 66 66
Cost per result 19.392 8.438
Total Cost $2.909 $1.182
Input Price $10.000 / 1M $1.750 / 1M
Output Price $50.000 / 1M $14.000 / 1M
Total Input Tokens 135,112 105,013
Output Tokens 7,594 9,914
Reasoning Tokens 23,558 61,338
Response Time (avg) 11.67s 28.51s
Response Time (max) 36.59s 116.86s
Response Time (total) 256.73s 456.13s
Parameters ~9.5T total (~878B active) ~1.2T total (~80B 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

#43 GPT-5.2

medium
Cost
$0.047
Time
49.2s
Tokens
3,396 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-5.2 10.0 10.0 100.0% 0 22.73s 7,302 511 11,912

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