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Claude Sonnet 4 vs Gemini 2.5 Flash
Comprehensive side-by-side LLM comparison
Claude Sonnet 4 leads with 32.2% higher average benchmark score. Gemini 2.5 Flash offers 744.2K more tokens in context window than Claude Sonnet 4. Gemini 2.5 Flash is $17.25 cheaper per million tokens. Overall, Claude Sonnet 4 is the stronger choice for coding tasks.
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Anthropic
Claude Sonnet 4, released by Anthropic in May 2025, is a large language model from the Claude 4 family that delivers a balance of performance and efficiency for coding, reasoning, and analytical tasks. It features a 200K token context window (extendable to 1M tokens in beta), 64K maximum output tokens, native image understanding, and extended thinking support. Sonnet 4 targets development workflows, document analysis, and applications that benefit from the performance characteristics of the Claude 4 generation.
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Google DeepMind
Gemini 2.5 Flash, released by Google in June 2025, is a large language model from the Gemini 2.5 family optimized for high-throughput, cost-efficient deployments with multimodal reasoning. It features a 1M token context window, hybrid thinking control, and native support for text, image, video, and audio input. Gemini 2.5 Flash targets latency-sensitive applications, document analysis, and high-volume API workloads that benefit from combined reasoning and generation in a single model.
1 month newer
Claude Sonnet 4
Anthropic
2025-05-14
Gemini 2.5 Flash
Google DeepMind
2025-06-17
Pricing Comparison
Cost per million tokens (USD)
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Claude Sonnet 4
Input:$3.00
Output:$15.00
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Gemini 2.5 Flash
Input:$0.15
Output:$0.60($17.25 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 1 common benchmarks
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Claude Sonnet 4
Average Score:35.6%(+32.2%)
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Gemini 2.5 Flash
Average Score:3.4%
Performance comparison across key benchmark categories
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Claude Sonnet 4
Tool Use35.6%(+32.2%)
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Gemini 2.5 Flash
Tool Use3.4%
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Knowledge Cutoff
Training data recency comparison
Claude Sonnet 4
2025-01
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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Claude Sonnet 4
3 providers
Anthropic
AWS Bedrock
Google Cloud Vertex AI
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Gemini 2.5 Flash
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Claude Sonnet 4
Avg Score:35.6%(+32.2%)
Providers:3
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Gemini 2.5 Flash
Avg Score:3.4%
Providers:2