LLM Comparison
Claude Opus 5 vs Gemini 3.6 Flash
Side-by-side specs, pricing & capabilities · Updated September 2026
Price vs Intelligence
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2/6 models| Organization | ||
| OpenTools Score | 92 6.1 | 54 12.0 |
| Family | Claude Opus | Gemini |
| Status | Current | Current |
| Release Date | Jul 2026 | Jul 2026 |
| Context Window | 1.0M tokens | 1.0M tokens |
| Input Price | $5.00/M tokens | $1.50/M tokens |
| Output Price | $25.00/M tokens | $7.50/M tokens |
| Pricing Notes | Claude Opus 5 is priced at $5 per million input tokens and $25 per million output tokens; fast mode is priced separately at Fable-level rates. | 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-useagentslong-context | textvisionaudio-inputvideo-inputpdf-inputreasoningcodingtool-usesearch-groundingcomputer-usestructured-output |
| Max Output | 128K tokens | 64K tokens |
| API Identifier | claude-opus-5 | gemini-3.6-flash |
| Benchmarks | ||
| Artificial Analysis Intelligence Index | 61artificial-analysis | 50artificial-analysis |
| Artificial Analysis Intelligence Index v4.1.1 | 63artificial-analysis | — |
| Artificial Analysis Intelligence Index v4.3 | 51https://artificialanalysis.ai/models/claude-opus-5 | 34https://artificialanalysis.ai/models/gemini-3-6-flash |
| GPQA Diamond | 93.2323artificial-analysis | 92.8283artificial-analysis |
| SciCode | 56.3657artificial-analysis | 53.3565artificial-analysis |
| Terminal-Bench 2.1 | 89.1386artificial-analysis | 78google-deepmind |
| SWE-Bench Pro | — | 58.7google-deepmind |
| GDPVal-AA v2 | — | 1421google-deepmind |
| View Claude Opus 5 | View Gemini 3.6 Flash | |
Cost Calculator
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| Model | Input | Output | Total / mo | vs Best |
|---|---|---|---|---|
| Gemini 3.6 FlashCheapest | $1.50 | $3.75 | $5.25 | — |
| Claude Opus 5 | $5.00 | $12.50 | $17.50 | +233% |
Anthropic
Claude Opus 5
Claude Opus 5 is Anthropic's Opus-class model for complex agentic coding and enterprise work. Official Claude docs list the claude-opus-5 API ID, 1M token context window, 128k max output, adaptive thinking, and $5 input / $25 output pricing 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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