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Claude Opus 4.6 vs Gemini 2.5 Flash
A detailed comparison of Claude Opus 4.6 (Anthropic) and Gemini 2.5 Flash (Google) across pricing, performance, and features.
Pricing Comparison
| Metric | Claude Opus 4.6 | Gemini 2.5 Flash | Difference |
|---|---|---|---|
| Input / 1M tokens | $5.00 | $0.15 | -97% |
| Output / 1M tokens | $25.00 | $0.60 | -98% |
| Context window | 200K | 1M | — |
| Max output | 32K | 65.536K | — |
Benchmark Comparison
| Benchmark | Claude Opus 4.6 | Gemini 2.5 Flash |
|---|---|---|
| MMLU-Pro | 89.5% | 76% |
| HumanEval | 95% | 89.5% |
| GPQA | 75.5% | — |
Capabilities
| Capability | Claude Opus 4.6 | Gemini 2.5 Flash |
|---|---|---|
| code | ✓ | ✓ |
| reasoning | ✓ | ✓ |
| text | ✓ | ✓ |
| tool-use | ✓ | ✓ |
| vision | ✓ | ✓ |
Claude Opus 4.6 Strengths
- ✓Best-in-class agentic tool use and coding
- ✓1M context available in beta (Tier 4)
- ✓Strong at following complex multi-step instructions
Claude Opus 4.6 Weaknesses
- ✗Premium pricing ($10/$37.50 at 1M context)
- ✗1M context beta is Tier 4 only
Gemini 2.5 Flash Strengths
- ✓One of the cheapest models available
- ✓1M context at budget pricing
- ✓Free tier available
Gemini 2.5 Flash Weaknesses
- ✗Weaker than Flash 3 on most benchmarks
- ✗Output quality inconsistent on edge cases
Quick Verdict
Best value: Gemini 2.5 Flash is the more affordable option at $0.15/$0.6 per 1M tokens.
Higher benchmarks: Claude Opus 4.6 scores higher on average across available benchmarks (86.7% avg).
Larger context: Gemini 2.5 Flash supports 1M tokens.
Choose Gemini 2.5 Flash if cost matters most. Choose Claude Opus 4.6 if you need the best possible quality for complex tasks.