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Claude Fable 5 (medium) vs GPT-5.4 (medium)

Claude Fable 5 (medium) leads on average score with 8.9 vs 8.8. GPT-5.4 (medium) has the lower benchmark cost at $2.213 vs $5.089. Claude Fable 5 (medium) is faster at 16.84s vs 24.81s, with pass rates of 79.7% vs 78.3%.

Last updated at: 2026-10-17

Compared models

Rank
#57
Total Output Tokens
47,285
Response Time (avg)
16.84s
Total Cost
$5.089
Rank
#60
Total Output Tokens
96,502
Response Time (avg)
24.81s
Total Cost
$2.213
Recommended model GPT-5.4 (medium)

Its score stays close to the best score here (8.8 vs 8.9), while costing about 2.3x less than Claude Fable 5 (medium).

Detailed comparison

Metric Claude Fable 5 Claude Fable 5 medium Release: 2026-06-10 GPT-5.4 GPT-5.4 medium Release: 2026-03-05
Score 8.9 8.8
Rank #57 #60
Reliability 10.0 10.0
Consistency 9.6 8.7
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 79.7% 78.3%
Flaky tests 1 4
Total Runs 69 69
Cost per result 28.269 12.535
Total Cost $5.089 $2.213
Input Price $10.000 / 1M $2.500 / 1M
Output Price $50.000 / 1M $15.000 / 1M
Cache Read Price $1.000 / 1M $0.250 / 1M
Cache Write Price $12.500 / 1M N/A
Total Input Tokens 272,411 223,210
Output Tokens 35,497 7,312
Reasoning Tokens 11,788 89,190
Response Time (avg) 16.84s 24.81s
Response Time (max) 80.80s 100.41s
Response Time (total) 387.26s 570.60s
Parameters ~9.5T total (~878B active) ~1.5T total (~100B 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.

#57 Claude Fable 5

medium
Cost
$0.606
Time
156.7s
Tokens
12,264 tok

#60 GPT-5.4

medium
Cost
$0.214
Time
199.6s
Tokens
14,349 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 10.0 10.0 100.0% 0 15.59s 10,590 7,383 1,318
GPT-5.4 8.8 7.8 88.9% 1 44.36s 7,305 433 24,216

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