Gemini 3.1 Flash-Lite vs Grok Build 0.1
Gemini 3.1 Flash-Lite (2026) and Grok Build 0.1 (2026) are agentic coding models from Google DeepMind and xAI. Gemini 3.1 Flash-Lite ships a 1M-token context window, while Grok Build 0.1 ships a 256K-token context window. On pricing, Gemini 3.1 Flash-Lite costs $0.25/1M input tokens versus $1/1M for the alternative. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit.
Gemini 3.1 Flash-Lite is ~300% cheaper at $0.25/1M; pay for Grok Build 0.1 only for coding workflow support.
Decision scorecard
Local evidence first| Signal | Gemini 3.1 Flash-Lite | Grok Build 0.1 |
|---|---|---|
| Decision fit | Coding, RAG, and Agents | Coding, RAG, and Agents |
| Context window | 1M | 256K |
| Cheapest output | $1.5/1M tokens | $2/1M tokens |
| Provider routes | 2 tracked | 1 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- Gemini 3.1 Flash-Lite has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Gemini 3.1 Flash-Lite has the lower cheapest tracked output price at $1.5/1M tokens.
- Gemini 3.1 Flash-Lite has broader tracked provider coverage for fallback and procurement flexibility.
- 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.
- Grok Build 0.1 uniquely exposes Reasoning in local model data.
- Local decision data tags Grok Build 0.1 for Coding, RAG, and Agents.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output prices on this page.
Gemini 3.1 Flash-Lite
$575
Cheapest tracked route: Google AI Studio
Grok Build 0.1
$1,300
Cheapest tracked route: xAI Console
Estimated monthly gap: $725. Batch, cache, and negotiated pricing are excluded from this local estimate.
Switch friction
- No overlapping tracked provider route is sourced for Gemini 3.1 Flash-Lite and Grok Build 0.1; plan for SDK, billing, or endpoint changes.
- Grok Build 0.1 is $0.5/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Check replacement coverage for Vision, Multimodal, and Code execution before moving production traffic.
- Grok Build 0.1 adds Reasoning in local capability data.
- No overlapping tracked provider route is sourced for Grok Build 0.1 and Gemini 3.1 Flash-Lite; plan for SDK, billing, or endpoint changes.
- Gemini 3.1 Flash-Lite is $0.5/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Reasoning before moving production traffic.
- Gemini 3.1 Flash-Lite adds Vision, Multimodal, and Code execution in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-05-07 | 2026-05-14 |
| Context window | 1M | 256K |
| Parameters | — | — |
| Architecture | decoder only | - |
| License | Proprietary | Proprietary |
| Knowledge cutoff | 2025-01 | - |
Pricing and availability
| Pricing attribute | Gemini 3.1 Flash-Lite | Grok Build 0.1 |
|---|---|---|
| Input price | $0.25/1M tokens | $1/1M tokens |
| Output price | $1.5/1M tokens | $2/1M tokens |
| Providers |
Capabilities
| Capability | Gemini 3.1 Flash-Lite | Grok Build 0.1 |
|---|---|---|
| Vision | Yes | No |
| Multimodal | Yes | No |
| Reasoning | No | Yes |
| Function calling | Yes | Yes |
| Tool use | Yes | Yes |
| Structured outputs | Yes | Yes |
| Code execution | Yes | No |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on vision: Gemini 3.1 Flash-Lite, multimodal input: Gemini 3.1 Flash-Lite, reasoning mode: Grok Build 0.1, 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, Gemini 3.1 Flash-Lite lists $0.25/1M input and $1.5/1M output tokens, while Grok Build 0.1 lists $1/1M input and $2/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Gemini 3.1 Flash-Lite lower by about $0.67 per million blended tokens. Availability is 2 providers versus 1, so concentration risk also matters.
Choose Gemini 3.1 Flash-Lite when coding workflow support, larger context windows, and lower input-token cost are central to the workload. Choose Grok Build 0.1 when coding workflow support are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship. This keeps the decision grounded in measurable tradeoffs instead of brand-level assumptions.
FAQ
Which has a larger context window, Gemini 3.1 Flash-Lite or Grok Build 0.1?
Gemini 3.1 Flash-Lite supports 1M tokens, while Grok Build 0.1 supports 256K tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Which is cheaper, Gemini 3.1 Flash-Lite or Grok Build 0.1?
Gemini 3.1 Flash-Lite is cheaper on tracked token pricing. Gemini 3.1 Flash-Lite costs $0.25/1M input and $1.5/1M output tokens. Grok Build 0.1 costs $1/1M input and $2/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Gemini 3.1 Flash-Lite or Grok Build 0.1 open source?
Gemini 3.1 Flash-Lite is listed under Proprietary. Grok Build 0.1 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, Gemini 3.1 Flash-Lite or Grok Build 0.1?
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, Gemini 3.1 Flash-Lite or Grok Build 0.1?
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 Gemini 3.1 Flash-Lite and Grok Build 0.1?
Gemini 3.1 Flash-Lite is available on Google AI Studio and OpenRouter. Grok Build 0.1 is available on xAI Console. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
Continue comparing
Last reviewed: 2026-05-20. Data sourced from public model cards and provider documentation.