Model Comparison

Claude Sonnet 4.5 vs Gemini 2.5 Flash-Lite

Claude Sonnet 4.5 significantly outperforms across most benchmarks. Gemini 2.5 Flash-Lite is 34.3x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

Claude Sonnet 4.5 outperforms in 2 benchmarks (AIME 2025, GPQA), while Gemini 2.5 Flash-Lite is better at 0 benchmarks.

Claude Sonnet 4.5 significantly outperforms across most benchmarks.

Thu Apr 30 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 4.5 ($3.00/1M tokens) is 30.0x more expensive than Gemini 2.5 Flash-Lite ($0.10/1M tokens).

For output processing, Claude Sonnet 4.5 ($15.00/1M tokens) is 37.5x more expensive than Gemini 2.5 Flash-Lite ($0.40/1M tokens).

In conclusion, Claude Sonnet 4.5 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
Thu Apr 30 2026 • llm-stats.com
Anthropic
Claude Sonnet 4.5
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
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 Sonnet 4.5's 200,000 tokens. Gemini 2.5 Flash-Lite can generate longer responses up to 65,536 tokens, while Claude Sonnet 4.5 is limited to 64,000 tokens.

Anthropic
Claude Sonnet 4.5
Input200,000 tokens
Output64,000 tokens
Google
Gemini 2.5 Flash-Lite
Input1,048,576 tokens
Output65,536 tokens
Thu Apr 30 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Sonnet 4.5 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 4.5

Text
Images
Audio
Video

Gemini 2.5 Flash-Lite

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Sonnet 4.5 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 4.5

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 4.5 was released on 2025-09-29, while Gemini 2.5 Flash-Lite was released on 2025-06-17.

Claude Sonnet 4.5 is 3 months newer than Gemini 2.5 Flash-Lite.

Claude Sonnet 4.5

Sep 29, 2025

7 months ago

3mo newer
Gemini 2.5 Flash-Lite

Jun 17, 2025

10 months ago

Knowledge Cutoff

When training data ends

Claude Sonnet 4.5 has a knowledge cutoff of 2025-01-31, while Gemini 2.5 Flash-Lite has a cutoff of 2025-01-01.

Claude Sonnet 4.5 has more recent training data (up to 2025-01-31), making it potentially better informed about events through that date compared to Gemini 2.5 Flash-Lite (2025-01-01).

Claude Sonnet 4.5

Jan 2025

Gemini 2.5 Flash-Lite

Jan 2025

Provider Availability

Claude Sonnet 4.5 is available from Anthropic. Gemini 2.5 Flash-Lite is available from Google.

Claude Sonnet 4.5

anthropic logo
Anthropic
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 (87.0% vs 49.8%)
Higher GPQA score (83.4% vs 64.6%)
Google
Larger context window (1,048,576 tokens)
Less expensive input tokens
Less expensive output tokens
Has open weights

Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude Sonnet 4.5
Google
Gemini 2.5 Flash-Lite

FAQ

Common questions about Claude Sonnet 4.5 vs Gemini 2.5 Flash-Lite

Claude Sonnet 4.5 significantly outperforms across most benchmarks. Claude Sonnet 4.5 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.
Claude Sonnet 4.5 scores MMMLU: 89.1%, AIME 2025: 87.0%, TAU-bench Retail: 86.2%, GPQA: 83.4%, MMMUval: 77.8%. 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%.
Gemini 2.5 Flash-Lite is 30.0x cheaper for input tokens. Claude Sonnet 4.5 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.
Claude Sonnet 4.5 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.
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.
Claude Sonnet 4.5 is developed by Anthropic and Gemini 2.5 Flash-Lite is developed by Google.