DeepSeek V3 vs Gemini 3.1 Flash-Lite
DeepSeek V3 (2024) and Gemini 3.1 Flash-Lite (2026) are compact production models from DeepSeek and Google DeepMind. DeepSeek V3 ships a 64k-token context window, while Gemini 3.1 Flash-Lite ships a 1M-token context window. On Chatbot Arena, Gemini 3.1 Flash-Lite leads by 130 pts. On pricing, DeepSeek V3 costs $0.10/1M input tokens versus $0.25/1M for the alternative. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit.
DeepSeek V3 is ~150% cheaper at $0.10/1M; pay for Gemini 3.1 Flash-Lite only for coding workflow support.
Decision scorecard
Local evidence first| Signal | DeepSeek V3 | Gemini 3.1 Flash-Lite |
|---|---|---|
| Best for | tool-calling agents and provider-routed production | multimodal apps, tool-calling agents, and long-context analysis |
| Decision fit | Coding, Agents, and Classification | Coding, RAG, and Agents |
| Context window | 64k | 1M |
| Cheapest output | $0.30/1M tokens | $1.50/1M tokens |
| Provider routes | 13 tracked | 3 tracked |
| Shared benchmarks | 1 rows | Chatbot Arena leader |
Decision tradeoffs
- DeepSeek V3 has the lower cheapest tracked output price at $0.30/1M tokens.
- DeepSeek V3 has broader tracked provider coverage for fallback and procurement flexibility.
- Local decision data tags DeepSeek V3 for Coding, Agents, and Classification.
- Gemini 3.1 Flash-Lite leads the largest shared benchmark signal on Chatbot Arena by 130 points.
- Gemini 3.1 Flash-Lite has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Gemini 3.1 Flash-Lite uniquely exposes Vision, Multimodal, and Code execution in local model data.
- Local decision data tags Gemini 3.1 Flash-Lite for Coding, RAG, and Agents.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
DeepSeek V3
$155
Cheapest tracked route/tier: Bitdeer AI
Gemini 3.1 Flash-Lite
$575
Cheapest tracked route/tier: Google AI Studio
Estimated monthly gap: $420. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on OpenRouter and Vercel AI Gateway; start route-level A/B tests there.
- Gemini 3.1 Flash-Lite is $1.20/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Gemini 3.1 Flash-Lite adds Vision, Multimodal, and Code execution in local capability data.
- Provider overlap exists on OpenRouter and Vercel AI Gateway; start route-level A/B tests there.
- DeepSeek V3 is $1.20/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Vision, Multimodal, and Code execution before moving production traffic.
Specs
| Specification | ||
|---|---|---|
| Released | 2024-12-26 | 2026-05-07 |
| Context window | 64k | 1M |
| Parameters | 671B | — |
| Architecture | mixture of experts | decoder only |
| License | Open Source | Proprietary |
| Knowledge cutoff | 2024-04 | 2025-01 |
Pricing and availability
| Pricing attribute | DeepSeek V3 | Gemini 3.1 Flash-Lite |
|---|---|---|
| Input price | $0.10/1M tokens | $0.25/1M tokens |
| Output price | $0.30/1M tokens | $1.50/1M tokens |
| Providers |
Capabilities
| Capability | DeepSeek V3 | Gemini 3.1 Flash-Lite |
|---|---|---|
| Vision | No | Yes |
| Multimodal | No | Yes |
| Reasoning | No | No |
| Function calling | Yes | Yes |
| Tool use | Yes | Yes |
| Structured outputs | Yes | Yes |
| Code execution | No | Yes |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
| Benchmark | DeepSeek V3 | Gemini 3.1 Flash-Lite |
|---|---|---|
| Chatbot Arena | 1302.0 | 1432.0 |
Deep dive
On shared benchmark coverage, Chatbot Arena has DeepSeek V3 at 1302 and Gemini 3.1 Flash-Lite at 1432, with Gemini 3.1 Flash-Lite ahead by 130 points. The largest visible gap is 130 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 vision: Gemini 3.1 Flash-Lite, multimodal input: Gemini 3.1 Flash-Lite, and code execution: Gemini 3.1 Flash-Lite. Both models share function calling, tool use, and structured outputs, 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, DeepSeek V3 lists $0.10/1M input and $0.30/1M output tokens on the cheapest tracked provider, while Gemini 3.1 Flash-Lite lists $0.25/1M input and $1.50/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts DeepSeek V3 lower by about $0.47 per million blended tokens. Availability is 13 providers versus 3, so concentration risk also matters.
Choose DeepSeek V3 when provider fit, lower input-token cost, and broader provider choice are central to the workload. Choose Gemini 3.1 Flash-Lite when coding workflow support and larger context windows 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, DeepSeek V3 or Gemini 3.1 Flash-Lite?
Gemini 3.1 Flash-Lite supports 1M tokens, while DeepSeek V3 supports 64k tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Which is cheaper, DeepSeek V3 or Gemini 3.1 Flash-Lite?
DeepSeek V3 is cheaper on tracked token pricing. DeepSeek V3 costs $0.10/1M input and $0.30/1M output tokens. Gemini 3.1 Flash-Lite costs $0.25/1M input and $1.50/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is DeepSeek V3 or Gemini 3.1 Flash-Lite open source?
DeepSeek V3 is listed under Open Source. 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, DeepSeek V3 or Gemini 3.1 Flash-Lite?
Gemini 3.1 Flash-Lite has the clearer documented vision signal in this comparison. If vision is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for multimodal input, DeepSeek V3 or Gemini 3.1 Flash-Lite?
Gemini 3.1 Flash-Lite has the clearer documented multimodal input signal in this comparison. If multimodal input is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run DeepSeek V3 and Gemini 3.1 Flash-Lite?
DeepSeek V3 is available on DeepInfra, Fireworks AI, DeepSeek Platform, Microsoft Foundry, and OpenRouter. Gemini 3.1 Flash-Lite is available on Google AI Studio, OpenRouter, and Vercel AI Gateway. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
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Last reviewed: 2026-05-22. Data sourced from public model cards and provider documentation.