DeepSeek V3.1 vs Gemini 2.5 Flash Live API
DeepSeek V3.1 (2025) and Gemini 2.5 Flash Live API (2025) are compact production models from DeepSeek and Google DeepMind. DeepSeek V3.1 ships a 64k-token context window, while Gemini 2.5 Flash Live API ships a 128k-token context window. On pricing, DeepSeek V3.1 costs $0.27/1M 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 V3.1 is ~85% cheaper at $0.27/1M; pay for Gemini 2.5 Flash Live API only for long-context analysis.
Decision scorecard
Local evidence first| Signal | DeepSeek V3.1 | Gemini 2.5 Flash Live API |
|---|---|---|
| Best for | multimodal apps and provider-routed production | multimodal apps and tool-calling agents |
| Decision fit | Coding, Agents, and Vision | RAG, Agents, and Long context |
| Context window | 64k | 128k |
| Cheapest output | $1/1M tokens | $2/1M tokens |
| Provider routes | 8 tracked | 1 tracked |
| Shared benchmarks | 0 shared | 0 shared |
Decision tradeoffs
- DeepSeek V3.1 has the lower cheapest tracked output price at $1/1M tokens.
- DeepSeek V3.1 has broader tracked provider coverage for fallback and route flexibility.
- DeepSeek V3.1 uniquely exposes Structured outputs and Code execution in local model data.
- Local decision data tags DeepSeek V3.1 for Coding, Agents, and Vision.
- Gemini 2.5 Flash Live API has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Gemini 2.5 Flash Live API uniquely exposes JSON / Tool use in local model data.
- Local decision data tags Gemini 2.5 Flash Live API for RAG, Agents, and Long context.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
DeepSeek V3.1
$466
Cheapest tracked route/tier: Novita AI
Gemini 2.5 Flash Live API
$900
Cheapest tracked route/tier: Google AI Studio
Estimated monthly gap: $434. 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 V3.1 and Gemini 2.5 Flash Live API; plan for SDK, billing, or endpoint changes.
- Gemini 2.5 Flash Live API is $1/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Check replacement coverage for Structured outputs and Code execution before moving production traffic.
- Gemini 2.5 Flash Live API adds JSON / Tool use in local capability data.
- No overlapping tracked provider route is sourced for Gemini 2.5 Flash Live API and DeepSeek V3.1; plan for SDK, billing, or endpoint changes.
- DeepSeek V3.1 is $1/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for JSON / Tool use before moving production traffic.
- DeepSeek V3.1 adds Structured outputs and Code execution in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-08-21 | 2025-12-01 |
| Context window | 64k | 128k |
| Parameters | 671B total, 37B active (MoE) | — |
| Architecture | Mixture of Experts | Decoder Only |
| License | MITOSI-approved | Proprietary |
| Openness | Open source | Proprietary |
| Weights | Unknown | Not released |
| Code | Unknown | Unknown |
| Commercial use | Commercial use: permitted | Commercial use: conditional |
| Knowledge cutoff | - | 2025-01 |
Pricing and availability
| Pricing attribute | DeepSeek V3.1 | Gemini 2.5 Flash Live API |
|---|---|---|
| Input price | $0.27/1M tokens | $0.50/1M tokens |
| Output price | $1/1M tokens | $2/1M tokens |
| Providers |
Capabilities
| Capability | DeepSeek V3.1 | Gemini 2.5 Flash Live API |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | Yes |
| Reasoning | No | No |
| JSON / Tool use | No | Yes |
| Structured outputs | Yes | No |
| Code execution | Yes | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
No shared benchmark scores are currently available for this pair.
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Last reviewed: 2026-06-29. Data sourced from public model cards and provider documentation.