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Claude Opus 4.6 vs Gemini 2.5 Flash
Comprehensive side-by-side LLM comparison
Claude Opus 4.6 leads with 45.5% higher average benchmark score. Gemini 2.5 Flash offers 680.2K more tokens in context window than Claude Opus 4.6. Gemini 2.5 Flash is $29.25 cheaper per million tokens. Overall, Claude Opus 4.6 is the stronger choice for coding tasks.
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Anthropic
Claude Opus 4.6, released by Anthropic in February 2026, is a large language model from the Claude 4 family designed for complex agent orchestration, extended reasoning, and long-form code generation. It features a 200K token context window (extendable to 1M tokens in beta), 128K maximum output tokens, native image understanding, and extended thinking with both standard and adaptive effort modes. Opus 4.6 targets multi-step agentic workflows, parallel tool use, and applications requiring sustained reasoning over large contexts.
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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.
7 months newer
Gemini 2.5 Flash
Google DeepMind
2025-06-17
Claude Opus 4.6
Anthropic
2026-02
Pricing Comparison
Cost per million tokens (USD)
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Claude Opus 4.6
Input:$5.00
Output:$25.00
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Gemini 2.5 Flash
Input:$0.15
Output:$0.60($29.25 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 5 common benchmarks
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Claude Opus 4.6
Average Score:68.0%(+45.5%)
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Gemini 2.5 Flash
Average Score:22.5%
Performance comparison across key benchmark categories
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Claude Opus 4.6
Science91.3%(+13.0%)
Agents84.0%(+81.5%)
Coding65.4%(+49.0%)
Tool Use59.5%(+56.1%)
Reasoning40.0%(+27.9%)
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Knowledge Cutoff
Training data recency comparison
Claude Opus 4.6
2025-05
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 Opus 4.6
3 providers
Anthropic
AWS Bedrock
Google Cloud Vertex AI
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Gemini 2.5 Flash
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Claude Opus 4.6
Avg Score:68.0%(+45.5%)
Providers:3
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Gemini 2.5 Flash
Avg Score:22.5%
Providers:2