Model comparison
Claude Sonnet 4.6 vs Gemini 2.5 Flash
The most significant observable difference is that Gemini 2.5 Flash supports multimodal inputs including text, image, audio, video, and files, while Claude Sonnet 4.6 is limited to text and image inputs.
Anthropic
Claude Sonnet 4.6
The pragmatic default — Claude quality without Opus pricing.
Gemini 2.5 Flash
Cheap multimodal at million-token scale.
Specs
| Metric | Claude Sonnet 4.6 | Gemini 2.5 Flash |
|---|---|---|
| Context window | 1M tokens | 1.0M tokens↑ |
| Input $/1M tokens | $3.00 | $0.300↑ |
| Output $/1M tokens | $15.00 | $2.50↑ |
| Modalities | Text · Image | File · Image · Text · Audio · Video |
| Open weights | No | No |
How they differ
Reasoning approach
Claude Sonnet 4.6
Claude Sonnet 4.6 specializes in safe, predictable reasoning with a focus on text-based tasks.
Gemini 2.5 Flash
Gemini 2.5 Flash showcases adaptive reasoning across multimodal inputs, including audio and video.
Cost profile
Claude Sonnet 4.6
Claude Sonnet 4.6 costs $3.0 per 1M input tokens and $15.0 per 1M output tokens.
Gemini 2.5 Flash
Gemini 2.5 Flash costs $0.3 per 1M input tokens and $2.5 per 1M output tokens, making it significantly more affordable.
Context handling
Claude Sonnet 4.6
Claude Sonnet 4.6 supports a context window of up to 1,000,000 tokens for extended text processing.
Gemini 2.5 Flash
Gemini 2.5 Flash enables slightly larger context handling with its 1,048,576 token window.
Vision support
Claude Sonnet 4.6
Claude Sonnet 4.6 supports image inputs alongside text-based tasks.
Gemini 2.5 Flash
Gemini 2.5 Flash integrates image inputs with other modalities like audio and video for complex multimodal tasks.
Claude Sonnet 4.6 — what sets it apart
- +Claude Sonnet 4.6 is optimized for safe and structured text outputs.
- +Focused primarily on text-based and image analysis tasks without additional modalities.
Gemini 2.5 Flash — what sets it apart
- +Gemini 2.5 Flash supports multimodal inputs, including audio, video, and file data.
- +Offers significant cost efficiency for token processing across input and output.
The most consequential difference lies in Gemini 2.5 Flash's multimodal input capabilities and cost-effectiveness compared to Claude Sonnet 4.6.
Analysis synthesized from gpt-4o, llama-4-maverick, phi-4, etc.