DeepSeek V4 Flash vs Nano Banana 2 (Gemini 3.1 Flash Image)
DeepSeek V4 Flash (2026) and Nano Banana 2 (Gemini 3.1 Flash Image) (2026) are frontier-tier reasoning models from DeepSeek and Google DeepMind. DeepSeek V4 Flash ships a 1m-token context window, while Nano Banana 2 (Gemini 3.1 Flash Image) ships a 131k-token context window. On pricing, DeepSeek V4 Flash costs $0.10/1M input tokens versus $0.50/1M for the alternative. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
DeepSeek V4 Flash is ~409% cheaper at $0.10/1M; pay for Nano Banana 2 (Gemini 3.1 Flash Image) only for vision-heavy evaluation.
Decision scorecard
Local evidence first| Signal | DeepSeek V4 Flash | Nano Banana 2 (Gemini 3.1 Flash Image) |
|---|---|---|
| Best for | reasoning-heavy apps, tool-calling agents, and long-context analysis | reasoning-heavy apps and multimodal apps |
| Decision fit | Coding, RAG, and Agents | Long context and Vision |
| Context window | 1m | 131k |
| Cheapest output | $0.20/1M tokens | $60/1M tokens |
| Provider routes | 6 tracked | 1 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- DeepSeek V4 Flash has the larger context window for long prompts, retrieval packs, or transcript analysis.
- DeepSeek V4 Flash has the lower cheapest tracked output price at $0.20/1M tokens.
- DeepSeek V4 Flash has broader tracked provider coverage for fallback and procurement flexibility.
- DeepSeek V4 Flash uniquely exposes Function calling, Tool use, and Structured outputs in local model data.
- Local decision data tags DeepSeek V4 Flash for Coding, RAG, and Agents.
- Nano Banana 2 (Gemini 3.1 Flash Image) uniquely exposes Vision and Multimodal in local model data.
- Local decision data tags Nano Banana 2 (Gemini 3.1 Flash Image) for Long context and Vision.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
DeepSeek V4 Flash
$128
Cheapest tracked route/tier: OpenRouter
Nano Banana 2 (Gemini 3.1 Flash Image)
$15,400
Cheapest tracked route/tier: Google AI Studio
Estimated monthly gap: $15,272. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- No overlapping tracked provider route is sourced for DeepSeek V4 Flash and Nano Banana 2 (Gemini 3.1 Flash Image); plan for SDK, billing, or endpoint changes.
- Nano Banana 2 (Gemini 3.1 Flash Image) is $59.80/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Check replacement coverage for Function calling, Tool use, and Structured outputs before moving production traffic.
- Nano Banana 2 (Gemini 3.1 Flash Image) adds Vision and Multimodal in local capability data.
- No overlapping tracked provider route is sourced for Nano Banana 2 (Gemini 3.1 Flash Image) and DeepSeek V4 Flash; plan for SDK, billing, or endpoint changes.
- DeepSeek V4 Flash is $59.80/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Vision and Multimodal before moving production traffic.
- DeepSeek V4 Flash adds Function calling, Tool use, and Structured outputs in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-04-24 | 2026-05-28 |
| Context window | 1m | 131k |
| Parameters | 284B | — |
| Architecture | mixture of experts | decoder only |
| License | MIT | Proprietary |
| Knowledge cutoff | - | 2025-01 |
Pricing and availability
| Pricing attribute | DeepSeek V4 Flash | Nano Banana 2 (Gemini 3.1 Flash Image) |
|---|---|---|
| Input price | $0.10/1M tokens | $0.50/1M tokens |
| Output price | $0.20/1M tokens | $60/1M tokens |
| Providers |
Capabilities
| Capability | DeepSeek V4 Flash | Nano Banana 2 (Gemini 3.1 Flash Image) |
|---|---|---|
| Vision | No | Yes |
| Multimodal | No | Yes |
| Reasoning | Yes | Yes |
| Function calling | Yes | No |
| Tool use | Yes | No |
| Structured outputs | Yes | No |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on vision: Nano Banana 2 (Gemini 3.1 Flash Image), multimodal input: Nano Banana 2 (Gemini 3.1 Flash Image), function calling: DeepSeek V4 Flash, tool use: DeepSeek V4 Flash, and structured outputs: DeepSeek V4 Flash. Both models share reasoning mode, 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 V4 Flash lists $0.10/1M input and $0.20/1M output tokens on the cheapest tracked provider, while Nano Banana 2 (Gemini 3.1 Flash Image) lists $0.50/1M input and $60/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts DeepSeek V4 Flash lower by about $18.22 per million blended tokens. Availability is 6 providers versus 1, so concentration risk also matters.
Choose DeepSeek V4 Flash when long-context analysis, larger context windows, and lower input-token cost are central to the workload. Choose Nano Banana 2 (Gemini 3.1 Flash Image) when vision-heavy evaluation 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 V4 Flash or Nano Banana 2 (Gemini 3.1 Flash Image)?
DeepSeek V4 Flash supports 1m tokens, while Nano Banana 2 (Gemini 3.1 Flash Image) supports 131k 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 V4 Flash or Nano Banana 2 (Gemini 3.1 Flash Image)?
DeepSeek V4 Flash is cheaper on tracked token pricing. DeepSeek V4 Flash costs $0.10/1M input and $0.20/1M output tokens. Nano Banana 2 (Gemini 3.1 Flash Image) costs $0.50/1M input and $60/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is DeepSeek V4 Flash or Nano Banana 2 (Gemini 3.1 Flash Image) open source?
DeepSeek V4 Flash is listed under MIT. Nano Banana 2 (Gemini 3.1 Flash Image) 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 V4 Flash or Nano Banana 2 (Gemini 3.1 Flash Image)?
Nano Banana 2 (Gemini 3.1 Flash Image) 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 V4 Flash or Nano Banana 2 (Gemini 3.1 Flash Image)?
Nano Banana 2 (Gemini 3.1 Flash Image) 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 V4 Flash and Nano Banana 2 (Gemini 3.1 Flash Image)?
DeepSeek V4 Flash is available on DeepSeek Platform, OpenRouter, Microsoft Foundry, Vercel AI Gateway, and Novita AI. Nano Banana 2 (Gemini 3.1 Flash Image) is available on Google AI Studio. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
Continue comparing
Last reviewed: 2026-06-01. Data sourced from public model cards and provider documentation.