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Claude Fable 5.1 vs Gemini 2.5 Flash-Lite

Claude Fable 5.1 leads the LLM Stats Score 54.8 to 10.7. Gemini 2.5 Flash-Lite is 114.3x cheaper per token.

Anthropic · Google · Updated for 2026

Which is better?

Claude Fable 5.1 leads the overall LLM Stats Score 54.8 to 10.7, ranking #5 overall.

In the 1 individual benchmarks reported for both models, Claude Fable 5.1 wins 1; this is a narrower head-to-head signal than the composite indexes.

On price, Gemini 2.5 Flash-Lite is roughly 114.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Gemini 2.5 Flash-Lite also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.

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

Choose Claude Fable 5.1

  • overall performance matters — it scores 54.8 and ranks #5 on LLM Stats
  • your work emphasizes reasoning — it leads those capability indexes
  • you value its reported benchmark strengths — it wins 1 of 1 exact shared results
  • you want the most recent training data — it shipped Sep 2026

Choose Gemini 2.5 Flash-Lite

  • cost matters — it's about 114.3x cheaper per token
  • you process long inputs — it offers a 1,048,576 token context window
  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

Claude Fable 5.1
Anthropic
Gemini 2.5 Flash-Lite
Google
Core performance indexes
LLM Stats Score
54.8
#5
10.7
#249
Reasoning
52.1
#7
11.2
#244
Cost, coverage & limits
Benchmark wins
1 of 1
0 of 1
Input price
$10.00 / M
$0.10 / M
Output price
$50.00 / M
$0.40 / M
Context window
1,000,000
1,048,576

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Claude Fable 5.1
Gemini 2.5 Flash-Lite
Vision
40.5#1
3.8#154
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

7 reported for Claude Fable 5.1 · 13 for Gemini 2.5 Flash-Lite

1 shared

Claude Fable 5.1 outperforms in 1 benchmarks (Humanity's Last Exam), while Gemini 2.5 Flash-Lite is better at 0 benchmarks.

Claude Fable 5.1 significantly outperforms across most benchmarks.

Wed Sep 02 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Gemini 2.5 Flash-Lite costs less

For input processing, Claude Fable 5.1 ($10.00/1M tokens) is 100.0x more expensive than Gemini 2.5 Flash-Lite ($0.10/1M tokens).

For output processing, Claude Fable 5.1 ($50.00/1M tokens) is 125.0x more expensive than Gemini 2.5 Flash-Lite ($0.40/1M tokens).

In conclusion, Claude Fable 5.1 is more expensive than Gemini 2.5 Flash-Lite.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Wed Sep 02 2026 • llm-stats.com
Anthropic
Claude Fable 5.1
Input tokens$10.00
Output tokens$50.00
Best providerAnthropic
Google
Gemini 2.5 Flash-Lite
Input tokens$0.10
Output tokens$0.40
Best providerGoogle
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Gemini 2.5 Flash-Lite accepts 1,048,576 input tokens compared to Claude Fable 5.1's 1,000,000 tokens. Claude Fable 5.1 can generate longer responses up to 128,000 tokens, while Gemini 2.5 Flash-Lite is limited to 65,536 tokens.

Anthropic
Claude Fable 5.1
Input1,000,000 tokens
Output128,000 tokens
Google
Gemini 2.5 Flash-Lite
Input1,048,576 tokens
Output65,536 tokens
Wed Sep 02 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Fable 5.1 and Gemini 2.5 Flash-Lite 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 2.5 Flash-Lite

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Fable 5.1 is licensed under a proprietary license, while Gemini 2.5 Flash-Lite uses Creative Commons Attribution 4.0 License.

License differences may affect how you can use these models in commercial or open-source projects.

Claude Fable 5.1

Proprietary

Closed source

Gemini 2.5 Flash-Lite

Creative Commons Attribution 4.0 License

Open weights

Release Timeline

When each model was launched

Claude Fable 5.1 was released on 2026-09-01, while Gemini 2.5 Flash-Lite was released on 2025-06-17.

Claude Fable 5.1 is 15 months newer than Gemini 2.5 Flash-Lite.

Claude Fable 5.1

Sep 1, 2026

0 days ago

1.2yr newer
Gemini 2.5 Flash-Lite

Jun 17, 2025

1.2 years ago

Knowledge Cutoff

When training data ends

Gemini 2.5 Flash-Lite has a documented knowledge cutoff of 2025-01-01, while Claude Fable 5.1's cutoff date is not specified.

We can confirm Gemini 2.5 Flash-Lite's training data extends to 2025-01-01, but cannot make a direct comparison without Claude Fable 5.1's cutoff date.

Claude Fable 5.1

—

Gemini 2.5 Flash-Lite

Jan 2025

Provider Availability

Claude Fable 5.1 is available from Anthropic. Gemini 2.5 Flash-Lite is available from Google.

Claude Fable 5.1

anthropic logo
Anthropic
Input Price:Input: $10.00/1MOutput Price:Output: $50.00/1M

Gemini 2.5 Flash-Lite

google logo
Google
Input Price:Input: $0.10/1MOutput Price:Output: $0.40/1M
* Prices shown are per million tokens

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 2.5 Flash-Lite side-by-side, then vote on the output you prefer.

Claude Fable 5.1
✓ Preferred
Gemini 2.5 Flash-Lite
Open in Playground

FAQ

Common questions about Claude Fable 5.1 vs Gemini 2.5 Flash-Lite.

Which is better, Claude Fable 5.1 or Gemini 2.5 Flash-Lite?

Claude Fable 5.1 leads the LLM Stats Score 54.8 to 10.7. Claude Fable 5.1 is made by Anthropic and Gemini 2.5 Flash-Lite 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 2.5 Flash-Lite 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 2.5 Flash-Lite scores FACTS Grounding: 84.1%, Global-MMLU-Lite: 81.1%, MMMU: 72.9%, GPQA: 64.6%, Vibe-Eval: 51.3%.

Is Claude Fable 5.1 cheaper than Gemini 2.5 Flash-Lite?

Gemini 2.5 Flash-Lite is 100.0x cheaper for input tokens. Claude Fable 5.1 costs $10.00/M input and $50.00/M output via anthropic. Gemini 2.5 Flash-Lite costs $0.10/M input and $0.40/M output via google.

What are the context window sizes for Claude Fable 5.1 and Gemini 2.5 Flash-Lite?

Claude Fable 5.1 supports 1.0M tokens and Gemini 2.5 Flash-Lite supports 1.0M 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 2.5 Flash-Lite?

Key differences include LLM Stats Score (54.8 vs 10.7), context window (1.0M vs 1.0M), input pricing ($10.00 vs $0.10/M), licensing (Proprietary vs Creative Commons Attribution 4.0 License). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Fable 5.1 and Gemini 2.5 Flash-Lite?

Claude Fable 5.1 is developed by Anthropic and Gemini 2.5 Flash-Lite is developed by Google.

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