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Anthropic: Claude Fable 5 vs OpenAI: GPT-5.6 Sol

Summary

Claude Fable 5 (medium) vs GPT-5.6 Sol (low) benchmark comparison: GPT-5.6 Sol (low) leads on average score with 9.5 vs 9.2. GPT-5.6 Sol (low) has the lower benchmark cost at $0.649 vs $3.165. GPT-5.6 Sol (low) is faster at 8.29s vs 17.01s, with pass rates of 82.5% vs 85.7%.

Recommended model: GPT-5.6 Sol (low) - It has the best score here (9.5), while costing about 4.9x less than Claude Fable 5 (medium).

Last updated at: 2026-07-09

Metric Claude Fable 5 Claude Fable 5 medium Release: 2026-06-10 GPT-5.6 Sol GPT-5.6 Sol low Release: 2026-07-09
Score 9.2 9.5
Rank #9 #3
Reliability 10.0 10.0
Consistency 9.6 9.2
Tests Correct
Attempt pass rate 82.5% 85.7%
Flaky tests 1 2
Total Runs 63 63
Cost per result 18.614 3.816
Total Cost $3.165 $0.649
Input Price $10.000 / 1M $5.000 / 1M
Output Price $50.000 / 1M $30.000 / 1M
Total Input Tokens 58,383 34,218
Output Tokens 41,340 1,898
Reasoning Tokens 10,269 14,023
Response Time (avg) 17.01s 8.29s
Response Time (max) 80.80s 53.91s
Response Time (total) 357.17s 174.04s

Generation showcase

Hamster playing table tennis

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

#9 Claude Fable 5

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

#3 GPT-5.6 Sol

low
Cost
$0.062
Time
26.7s
Tokens
2,150 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

Anti-AI Tricks 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 6.20s 834 530 402
GPT-5.6 Sol 8.3 10.0 75.0% 0 2.60s 606 174 492
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-5.6 Sol 10.0 10.0 100.0% 0 11.25s 7,302 412 3,482
Combined 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 33.70s 20,937 2,353 1,599
GPT-5.6 Sol 10.0 10.0 100.0% 0 9.87s 11,019 318 792
Data parsing and extraction 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 7.18s 10,503 521 363
GPT-5.6 Sol 10.0 10.0 100.0% 0 1.82s 7,140 222 0
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Fable 5 5.3 7.2 44.4% 1 53.40s 975 25,215 5,001
GPT-5.6 Sol 5.3 7.2 44.4% 1 29.07s 723 71 7,822
General Intelligence 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 7.42s 708 366 144
GPT-5.6 Sol 10.0 10.0 100.0% 0 3.07s 477 99 135
Instructions following 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 5.90s 909 139 202
GPT-5.6 Sol 10.0 10.0 100.0% 0 2.27s 660 90 146
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Fable 5 7.7 10.0 66.7% 0 5.18s 894 402 324
GPT-5.6 Sol 8.2 7.2 88.9% 1 3.44s 642 224 534
Tool Calling 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 16.96s 11,775 729 344
GPT-5.6 Sol 10.0 10.0 100.0% 0 7.56s 5,454 258 294
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Fable 5 3.0 10.0 0.0% 0 25.64s 258 3,702 572
GPT-5.6 Sol 10.0 10.0 100.0% 0 3.67s 195 30 326

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