LLM Comparison
Claude Sonnet 5.5 vs Gemini 3.6 Flash
Side-by-side specs, pricing & capabilities · Updated September 2026
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2/6 models| Organization | ||
| OpenTools Score | 55 12.2 | |
| Family | Claude Sonnet | Gemini |
| Status | Current | Current |
| Release Date | Sep 2026 | Jul 2026 |
| Context Window | 1.0M tokens | 1.0M tokens |
| Input Price | $2.00/M tokens | $1.50/M tokens |
| Output Price | $10.00/M tokens | $7.50/M tokens |
| Pricing Notes | Anthropic Claude API standard tier, USD per million tokens: $2 input, $10 output; 5-minute cache writes $2.50, 1-hour cache writes $4, cache reads $0.20. Batch API gives 50% off input and output. A 300K output limit is available only for Message Batches API with the output-300k-2026-03-24 beta header; standard maximum output is 128K. Provider and regional terms may vary. | DeepMind model page lists $1.50 input and $7.50 output per 1M tokens with no caching in the performance table. The ai.google.dev API docs were attempted through ScrapingBee and returned HTTP 400, so exact billing details beyond the official DeepMind price table were not used. |
| Capabilities | textvisionreasoningcodingtool-uselong-contextcontext-caching | textvisionaudio-inputvideo-inputpdf-inputreasoningcodingtool-usesearch-groundingcomputer-usestructured-output |
| Training Cutoff | 2026-06 | — |
| Max Output | 128K tokens | 64K tokens |
| API Identifier | claude-sonnet-5-5 | gemini-3.6-flash |
| Benchmarks | ||
| Artificial Analysis Intelligence Index v4.3.2 | 55.9779549012591artificial-analysis | — |
| Artificial Analysis Intelligence Index | — | 50artificial-analysis |
| SWE-Bench Pro | — | 58.7google-deepmind |
| Terminal-Bench 2.1 | — | 78google-deepmind |
| GDPVal-AA v2 | — | 1421google-deepmind |
| Artificial Analysis Intelligence Index v4.3 | — | 34https://artificialanalysis.ai/models/gemini-3-6-flash |
| GPQA Diamond | — | 92.8283artificial-analysis |
| SciCode | — | 53.3565artificial-analysis |
| View Claude Sonnet 5.5 | View Gemini 3.6 Flash | |
Cost Calculator
Enter your expected monthly token usage to compare costs.
| Model | Input | Output | Total / mo | vs Best |
|---|---|---|---|---|
| Gemini 3.6 FlashCheapest | $1.50 | $3.75 | $5.25 | — |
| Claude Sonnet 5.5 | $2.00 | $5.00 | $7.00 | +33% |
Anthropic
Claude Sonnet 5.5
Claude Sonnet 5.5 is Anthropic's proprietary adaptive-reasoning model. The Claude API identifier is claude-sonnet-5-5. It accepts text and images, returns text, has a 1,000,000-token context window and a 128,000-token standard output limit. Anthropic lists standard API input and output pricing at $2 and $10 per million tokens.
Gemini 3.6 Flash
Gemini 3.6 Flash is Google DeepMind general availability Flash model for coding, agentic execution, spatial reasoning, multimodal understanding, and long-context production workflows. Official DeepMind evidence lists 1M input tokens, 64k output tokens, text, image, video, audio, and PDF inputs, text output, tool use, Gemini API availability, and $1.50 input / $7.50 output pricing per million tokens.
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