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Claude Fable 5.1 vs Gemini 2.0 Flash Thinking

Claude Fable 5.1 leads the LLM Stats Score 56.8 to 17.1.

Anthropic · Google · Updated for 2026

Which is better?

Claude Fable 5.1 leads the overall LLM Stats Score 56.8 to 17.1, ranking #1 overall.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Claude Fable 5.1

  • overall performance matters — it scores 56.8 and ranks #1 on LLM Stats
  • your work emphasizes reasoning — it leads those capability indexes
  • you want the most recent training data — it shipped Sep 2026

Choose Gemini 2.0 Flash Thinking

  • you are already invested in the Google ecosystem

At a glance

The differences that matter most.

Claude Fable 5.1
Anthropic
Gemini 2.0 Flash Thinking
Google
Core performance indexes
LLM Stats Score
56.8
#1
17.1
#203
Reasoning
54.6
#4
17.3
#196
Cost, coverage & limits
Benchmark wins
—
—
Input price
$10.00 / M
— / M
Output price
$50.00 / M
— / M
Context window
1,000,000
—

Individual benchmarks

7 reported for Claude Fable 5.1 · 3 for Gemini 2.0 Flash Thinking

No common benchmarks found

Claude Fable 5.1 and Gemini 2.0 Flash Thinkingdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only Claude Fable 5.1 specifies input context (1,000,000 tokens). Only Claude Fable 5.1 specifies output context (128,000 tokens).

Anthropic
Claude Fable 5.1
Input1,000,000 tokens
Output128,000 tokens
Google
Gemini 2.0 Flash Thinking
Input- tokens
Output- tokens
Wed Sep 02 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Fable 5.1 and Gemini 2.0 Flash Thinking support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Claude Fable 5.1

Text
Images
Audio
Video

Gemini 2.0 Flash Thinking

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Claude Fable 5.1

Proprietary

Closed source

Gemini 2.0 Flash Thinking

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Fable 5.1 was released on 2026-09-01, while Gemini 2.0 Flash Thinking was released on 2025-01-21.

Claude Fable 5.1 is 20 months newer than Gemini 2.0 Flash Thinking.

Claude Fable 5.1

Sep 1, 2026

1 days ago

1.6yr newer
Gemini 2.0 Flash Thinking

Jan 21, 2025

1.6 years ago

Knowledge Cutoff

When training data ends

Gemini 2.0 Flash Thinking has a documented knowledge cutoff of 2024-08-01, while Claude Fable 5.1's cutoff date is not specified.

We can confirm Gemini 2.0 Flash Thinking's training data extends to 2024-08-01, but cannot make a direct comparison without Claude Fable 5.1's cutoff date.

Claude Fable 5.1

—

Gemini 2.0 Flash Thinking

Aug 2024

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Claude Fable 5.1 and Gemini 2.0 Flash Thinking side-by-side, then vote on the output you prefer.

Claude Fable 5.1
✓ Preferred
Gemini 2.0 Flash Thinking
Open in Playground

FAQ

Common questions about Claude Fable 5.1 vs Gemini 2.0 Flash Thinking.

Which is better, Claude Fable 5.1 or Gemini 2.0 Flash Thinking?

Claude Fable 5.1 leads the LLM Stats Score 56.8 to 17.1. Claude Fable 5.1 is made by Anthropic and Gemini 2.0 Flash Thinking is made by Google. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Claude Fable 5.1 compare to Gemini 2.0 Flash Thinking in benchmarks?

Claude Fable 5.1 scores OSWorld 2.0: 77.9%, CursorBench v3.2: 73.4%, Humanity's Last Exam: 65.0%, GDPval-AA: 61.8%, Terminal-Bench 4.0: 55.8%. Gemini 2.0 Flash Thinking scores MMMU: 75.4%, GPQA: 74.2%, AIME 2024: 73.3%.

What are the context window sizes for Claude Fable 5.1 and Gemini 2.0 Flash Thinking?

Claude Fable 5.1 supports 1.0M tokens and Gemini 2.0 Flash Thinking supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Fable 5.1 and Gemini 2.0 Flash Thinking?

Key differences include LLM Stats Score (56.8 vs 17.1). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Fable 5.1 and Gemini 2.0 Flash Thinking?

Claude Fable 5.1 is developed by Anthropic and Gemini 2.0 Flash Thinking is developed by Google.

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