AnthropicClaude Fable 5VSGoogleGemini 3.5 Flash Lite

Analysis by:the whichllmmodel Editorial Team|Updated: June 2026

Our Take

This matchup represents a clear tradeoff between peak intelligence and budget efficiency. Claude Fable 5 is noticeably superior (holding a 18.1% average lead in benchmarks), but it carries a massive 23.5x price premium. Choose Claude Fable 5 if you need top-tier reasoning or code debugging, but for high-volume pipelines, Gemini 3.5 Flash Lite is the smarter business decision.

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Model Specs

Claude Fable 5

Website

Benchmarks & Scores

Coding (swe-bench-pro)Winner (+26.1%)

80.3%

excellent at multi-file repositories, autonomous agents, and industrial codebases

Reasoning (gpqa-diamond)Winner (+10.1%)

94.1%

graduate-level science QA

Cost & Context

Cost (per 1M tokens)

$20.00Input: $10.00 | Output: $50.00

Context Window

1.05M tokens

Model Specs

Gemini 3.5 Flash Lite

Website

Benchmarks & Scores

Coding (swe-bench-pro)

54.2%

excellent at multi-file repositories, autonomous agents, and industrial codebases

Reasoning (gpqa-diamond)

84%

graduate-level science QA

Cost & Context

Cost (per 1M tokens)23.5x cheaper

$0.85Input: $0.30 | Output: $2.50

Context Window

1.05M tokens

Read our data collection methodology

Frequently Asked Questions about Claude Fable 5 vs Gemini 3.5 Flash Lite

Gemini 3.5 Flash Lite is cheaper than Claude Fable 5. Gemini 3.5 Flash Lite has a blended cost of $0.85/1M tokens, which is about 23.5x cheaper than Claude Fable 5 at $20.00/1M tokens.

Claude Fable 5 is better for coding tasks on this benchmark. It scores 80.3% on swe-bench-pro (excellent at multi-file repositories, autonomous agents, and industrial codebases) compared to Gemini 3.5 Flash Lite which scores 54.2%.

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