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Claude Fable 5.1 (high) vs GPT-6 Astra (medium)

GPT-6 Astra (medium) leads on average score with 9.4 vs 9.0. GPT-6 Astra (medium) has the lower benchmark cost at $1.774 vs $3.364. GPT-6 Astra (medium) is faster at 8.08s vs 13.59s, with pass rates of 89.4% vs 90.9%.

Last updated at: 2026-09-04

Rank
#25
Total Output Tokens
40,071
Response Time (avg)
13.59s
Total Cost
$3.364
Rank
#14
Total Output Tokens
19,627
Response Time (avg)
8.08s
Total Cost
$1.774
Recommended model GPT-6 Astra (medium)

It has the best score here (9.4), while costing about 1.9x less than Claude Fable 5.1 (high).

Detailed comparison

Metric Claude Fable 5.1 Claude Fable 5.1 high Release: 2026-09-02 GPT-6 Astra GPT-6 Astra medium Release: 2026-09-04
Score 9.0 9.4
Rank #25 #14
Reliability 10.0 9.9
Consistency 9.6 9.2
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 89.4% 90.9%
Flaky tests 1 2
Total Runs 66 66
Cost per result 17.701 9.337
Total Cost $3.364 $1.774
Input Price $10.000 / 1M $10.000 / 1M
Output Price $50.000 / 1M $50.000 / 1M
Total Input Tokens 135,958 79,264
Output Tokens 7,930 4,789
Reasoning Tokens 32,141 14,838
Response Time (avg) 13.59s 8.08s
Response Time (max) 40.17s 73.48s
Response Time (total) 298.90s 177.70s
Parameters ~9.5T total (~878B active) ~2T total (~150B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#25 Claude Fable 5.1

high
Cost
$0.384
Time
102.5s
Tokens
7,824 tok

#14 GPT-6 Astra

medium
Cost
$0.231
Time
81.0s
Tokens
4,708 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 8.4 7.4 88.9% 1 13.91s 10,608 520 6,503
GPT-6 Astra 10.0 10.0 100.0% 0 4.95s 7,302 394 1,673

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