Model Comparison

Claude Sonnet 4 vs Gemini 2.5 Flash-LiteWhich is better in 2026?

Claude Sonnet 4 significantly outperforms across most benchmarks. Gemini 2.5 Flash-Lite is 34.3x cheaper per token.

Verdict: Claude Sonnet 4 vs Gemini 2.5 Flash-Lite — which is better?

Claude Sonnet 4 (by Anthropic) and Gemini 2.5 Flash-Lite (by Google) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Claude Sonnet 4 outperforms in 4 benchmarks (AIME 2025, GPQA, MMMU, SWE-Bench Verified), while Gemini 2.5 Flash-Lite is better at 0 benchmarks. Claude Sonnet 4 significantly outperforms across most benchmarks.

On price, Gemini 2.5 Flash-Lite is roughly 34.3x 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.

Choose Claude Sonnet 4 if…

  • you want the strongest raw capability — it leads on 4 of 4 shared benchmarks

Choose Gemini 2.5 Flash-Lite if…

  • cost matters — it's about 34.3x cheaper per token
  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Jun 2025
  • you need open weights you can self-host or fine-tune

Performance Benchmarks

Comparative analysis across standard metrics

4 benchmarks

Claude Sonnet 4 outperforms in 4 benchmarks (AIME 2025, GPQA, MMMU, SWE-Bench Verified), while Gemini 2.5 Flash-Lite is better at 0 benchmarks.

Claude Sonnet 4 significantly outperforms across most benchmarks.

Wed Jul 15 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Gemini 2.5 Flash-Lite costs less

For input processing, Claude Sonnet 4 ($3.00/1M tokens) is 30.0x more expensive than Gemini 2.5 Flash-Lite ($0.10/1M tokens).

For output processing, Claude Sonnet 4 ($15.00/1M tokens) is 37.5x more expensive than Gemini 2.5 Flash-Lite ($0.40/1M tokens).

In conclusion, Claude Sonnet 4 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 Jul 15 2026 • llm-stats.com
Anthropic
Claude Sonnet 4
Input tokens$3.00
Output tokens$15.00
Best providerAnthropic
Google
Gemini 2.5 Flash-Lite
Input tokens$0.10
Output tokens$0.40
Best providerGoogle
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Context Window

Maximum input and output token capacity

Gemini 2.5 Flash-Lite accepts 1,048,576 input tokens compared to Claude Sonnet 4's 200,000 tokens. Gemini 2.5 Flash-Lite can generate longer responses up to 65,536 tokens, while Claude Sonnet 4 is limited to 64,000 tokens.

Anthropic
Claude Sonnet 4
Input200,000 tokens
Output64,000 tokens
Google
Gemini 2.5 Flash-Lite
Input1,048,576 tokens
Output65,536 tokens
Wed Jul 15 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Sonnet 4 and Gemini 2.5 Flash-Lite support multimodal inputs.

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

Claude Sonnet 4

Text
Images
Audio
Video

Gemini 2.5 Flash-Lite

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Sonnet 4 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 Sonnet 4

Proprietary

Closed source

Gemini 2.5 Flash-Lite

Creative Commons Attribution 4.0 License

Open weights

Release Timeline

When each model was launched

Claude Sonnet 4 was released on 2025-05-22, while Gemini 2.5 Flash-Lite was released on 2025-06-17.

Gemini 2.5 Flash-Lite is 1 month newer than Claude Sonnet 4.

Claude Sonnet 4

May 22, 2025

1.1 years ago

Gemini 2.5 Flash-Lite

Jun 17, 2025

1.1 years ago

3w newer

Knowledge Cutoff

When training data ends

Gemini 2.5 Flash-Lite has a documented knowledge cutoff of 2025-01-01, while Claude Sonnet 4'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 Sonnet 4's cutoff date.

Claude Sonnet 4

—

Gemini 2.5 Flash-Lite

Jan 2025

Provider Availability

Claude Sonnet 4 is available from Anthropic, Bedrock, Google. Gemini 2.5 Flash-Lite is available from Google.

Claude Sonnet 4

anthropic logo
Anthropic
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M
bedrock logo
AWS Bedrock
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M
google logo
Google
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M

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

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Key Takeaways

Anthropic
Higher AIME 2025 score (70.5% vs 49.8%)
Higher GPQA score (75.4% vs 64.6%)
Higher MMMU score (74.4% vs 72.9%)
Higher SWE-Bench Verified score (72.7% vs 31.6%)
Google
Larger context window (1,048,576 tokens)
Less expensive input tokens
Less expensive output tokens
Has open weights
AnthropicClaude Sonnet 4
GoogleGemini 2.5 Flash-Lite
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Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Claude Sonnet 4 and Gemini 2.5 Flash-Lite side-by-side, then vote on the output you prefer.

Claude Sonnet 4
✓ Preferred
Gemini 2.5 Flash-Lite
Open in Playground
AI Model Comparison Table
Feature
Anthropic
Claude Sonnet 4
Google
Gemini 2.5 Flash-Lite

FAQ

Common questions about Claude Sonnet 4 vs Gemini 2.5 Flash-Lite.

Which is better, Claude Sonnet 4 or Gemini 2.5 Flash-Lite?

Claude Sonnet 4 significantly outperforms across most benchmarks. Claude Sonnet 4 is made by Anthropic and Gemini 2.5 Flash-Lite is made by Google. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude Sonnet 4 compare to Gemini 2.5 Flash-Lite in benchmarks?

Claude Sonnet 4 scores MMMLU: 86.5%, TAU-bench Retail: 80.5%, GPQA: 75.4%, MMMU: 74.4%, SWE-Bench Verified: 72.7%. 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 Sonnet 4 cheaper than Gemini 2.5 Flash-Lite?

Gemini 2.5 Flash-Lite is 30.0x cheaper for input tokens. Claude Sonnet 4 costs $3.00/M input and $15.00/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 Sonnet 4 and Gemini 2.5 Flash-Lite?

Claude Sonnet 4 supports 200K 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 Sonnet 4 and Gemini 2.5 Flash-Lite?

Key differences include context window (200K vs 1.0M), input pricing ($3.00 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 Sonnet 4 and Gemini 2.5 Flash-Lite?

Claude Sonnet 4 is developed by Anthropic and Gemini 2.5 Flash-Lite is developed by Google.

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