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Claude Opus 4.6 vs Gemini 3 Flash
Comprehensive side-by-side LLM comparison
Claude Opus 4.6 leads with 11.0% higher average benchmark score. Gemini 3 Flash offers 680.2K more tokens in context window than Claude Opus 4.6. Gemini 3 Flash is $29.50 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 3 Flash, released by Google in December 2025, is a large language model from the Gemini 3 family that delivers reasoning and coding performance with efficiency optimized for high-volume workloads. It features a 1M token context window, 64K maximum output tokens, and native support for text, image, audio, video, and PDF input. Gemini 3 Flash targets cost-sensitive agentic workflows, document processing, and production APIs requiring fast, capable multimodal responses.
1 month newer
Gemini 3 Flash
Google DeepMind
2025-12-17
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 3 Flash
Input:$0.10
Output:$0.40($29.50 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 4 common benchmarks
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Claude Opus 4.6
Average Score:66.7%(+11.0%)
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Gemini 3 Flash
Average Score:55.6%
Performance comparison across key benchmark categories
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Claude Opus 4.6
Reasoning68.8%(+35.2%)
Coding66.0%(+3.0%)
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Gemini 3 Flash
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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 3 Flash
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Claude Opus 4.6
Avg Score:66.7%(+11.0%)
Providers:3
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Gemini 3 Flash
Avg Score:55.6%
Providers:2