Claude Opus 4.6 vs Gemini 3.1 Flash-Lite
Claude Opus 4.6 (2026) and Gemini 3.1 Flash-Lite (2026) are frontier reasoning models from Anthropic and Google DeepMind. Claude Opus 4.6 ships a 1M-token context window, while Gemini 3.1 Flash-Lite ships a 1M-token context window. On Google-Proof Q&A, Claude Opus 4.6 leads by 4.4 pts. On pricing, Gemini 3.1 Flash-Lite costs $0.25/1M input tokens versus $5/1M for the alternative. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit.
Gemini 3.1 Flash-Lite is ~1900% cheaper at $0.25/1M; pay for Claude Opus 4.6 only for coding workflow support.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-02-05 | 2026-05-07 |
| Context window | 1M | 1M |
| Parameters | — | — |
| Architecture | decoder only | decoder only |
| License | Proprietary | Proprietary |
| Knowledge cutoff | 2025-12 | 2025-01 |
Pricing and availability
| Pricing attribute | Claude Opus 4.6 | Gemini 3.1 Flash-Lite |
|---|---|---|
| Input price | $5/1M tokens | $0.25/1M tokens |
| Output price | $25/1M tokens | $1.5/1M tokens |
| Providers |
Capabilities
| Capability | Claude Opus 4.6 | Gemini 3.1 Flash-Lite |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | Yes |
| Reasoning | Yes | No |
| Function calling | Yes | Yes |
| Tool use | Yes | Yes |
| Structured outputs | Yes | Yes |
| Code execution | Yes | Yes |
Benchmarks
| Benchmark | Claude Opus 4.6 | Gemini 3.1 Flash-Lite |
|---|---|---|
| Google-Proof Q&A | 91.3 | 86.9 |
| Chatbot Arena | 1501.0 | 1432.0 |
Deep dive
On shared benchmark coverage, Google-Proof Q&A has Claude Opus 4.6 at 91.3 and Gemini 3.1 Flash-Lite at 86.9, with Claude Opus 4.6 ahead by 4.4 points; Chatbot Arena has Claude Opus 4.6 at 1501 and Gemini 3.1 Flash-Lite at 1432, with Claude Opus 4.6 ahead by 69 points. The largest visible gap is 69 points on Chatbot Arena, which matters most when that benchmark mirrors your workload. Treat isolated benchmark wins as directional, because provider routing, prompt style, and tool access can move real application results.
The capability footprint differs most on reasoning mode: Claude Opus 4.6. Both models share vision, multimodal input, function calling, and tool use, so the practical split is not just feature count. Use those differences to decide whether the page is about raw model quality, agentic coding support, multimodal ingestion, or predictable structured API behavior.
For cost, Claude Opus 4.6 lists $5/1M input and $25/1M output tokens, while Gemini 3.1 Flash-Lite lists $0.25/1M input and $1.5/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Gemini 3.1 Flash-Lite lower by about $10.38 per million blended tokens. Availability is 4 providers versus 2, so concentration risk also matters.
Choose Claude Opus 4.6 when coding workflow support and broader provider choice are central to the workload. Choose Gemini 3.1 Flash-Lite when coding workflow support, larger context windows, and lower input-token cost are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship.
FAQ
Which has a larger context window, Claude Opus 4.6 or Gemini 3.1 Flash-Lite?
Gemini 3.1 Flash-Lite supports 1M tokens, while Claude Opus 4.6 supports 1M tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Which is cheaper, Claude Opus 4.6 or Gemini 3.1 Flash-Lite?
Gemini 3.1 Flash-Lite is cheaper on tracked token pricing. Claude Opus 4.6 costs $5/1M input and $25/1M output tokens. Gemini 3.1 Flash-Lite costs $0.25/1M input and $1.5/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Claude Opus 4.6 or Gemini 3.1 Flash-Lite open source?
Claude Opus 4.6 is listed under Proprietary. Gemini 3.1 Flash-Lite is listed under Proprietary. License labels affect whether you can self-host, redistribute weights, or rely only on hosted APIs, so confirm the upstream license before deployment.
Which is better for vision, Claude Opus 4.6 or Gemini 3.1 Flash-Lite?
Both Claude Opus 4.6 and Gemini 3.1 Flash-Lite expose vision. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface.
Which is better for multimodal input, Claude Opus 4.6 or Gemini 3.1 Flash-Lite?
Both Claude Opus 4.6 and Gemini 3.1 Flash-Lite expose multimodal input. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface.
Where can I run Claude Opus 4.6 and Gemini 3.1 Flash-Lite?
Claude Opus 4.6 is available on OpenRouter, Anthropic, AWS Bedrock, and GCP Vertex AI. Gemini 3.1 Flash-Lite is available on Google AI Studio and OpenRouter. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
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Last reviewed: 2026-05-11. Data sourced from public model cards and provider documentation.