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Anthropic: Claude Fable 5 vs Google: Gemini 3.5 Flash

Summary

Claude Fable 5 vs Gemini 3.5 Flash benchmark comparison: Claude Fable 5 leads on average score with 8.7 vs 8.1. Gemini 3.5 Flash has the lower benchmark cost at $1.079 vs $3.165. Gemini 3.5 Flash is faster at 9.93s vs 17.01s, with pass rates of 82.5% vs 77.8%.

Recommended model: Gemini 3.5 Flash - Its score stays close to the best score here (8.1 vs 8.7), while costing about 2.9x less than Claude Fable 5.

Last updated at: 2026-06-10

Metric Claude Fable 5 Claude Fable 5 medium Release: 2026-06-10 Gemini 3.5 Flash Gemini 3.5 Flash none Release: 2026-05-19
Score 8.7 8.1
Rank #12 #21
Reliability 10.0 10.0
Consistency 9.6 8.9
Tests Correct
Attempt pass rate 82.5% 77.8%
Flaky tests 1 3
Total Runs 63 63
Cost per result 18.614 7.190
Total Cost $3.165 $1.079
Input Price $10.000 / 1M $1.500 / 1M
Output Price $50.000 / 1M $9.000 / 1M
Total Input Tokens 58,383 13,843
Output Tokens 41,340 117,518
Reasoning Tokens 10,269 0
Response Time (avg) 17.01s 9.93s
Response Time (max) 80.80s 64.36s
Response Time (total) 357.17s 178.68s

Generation showcase

Hamster playing table tennis

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

#12 Claude Fable 5

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

#21 Gemini 3.5 Flash

none
Cost
$0.225
Time
125.5s
Tokens
25,004 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
Gemini 3.5 Flash 10.0 10.0 100.0% 0 2.53s 492 5,101 0
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
Gemini 3.5 Flash 8.8 7.8 88.9% 1 34.69s 8,122 75,927 0
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
Gemini 3.5 Flash 3.0 10.0 0.0% 0 0ms 0 0 0
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
Gemini 3.5 Flash 6.5 10.0 50.0% 0 8.10s 2,781 5,895 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
Gemini 3.5 Flash 7.6 7.2 77.8% 1 10.64s 633 17,910 0
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
Gemini 3.5 Flash 10.0 10.0 100.0% 0 3.46s 486 1,620 0
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
Gemini 3.5 Flash 9.8 10.0 100.0% 0 3.38s 615 3,928 0
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
Gemini 3.5 Flash 10.0 10.0 100.0% 0 3.13s 558 4,640 0
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
Gemini 3.5 Flash 3.0 10.0 0.0% 0 0ms 0 0 0
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
Gemini 3.5 Flash 2.8 1.6 33.3% 1 4.87s 156 2,497 0

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