Gemini 3.5 Flash vs Gemini 3.5 Flash-Lite
Gemini 3.5 Flash (2026) and Gemini 3.5 Flash-Lite (2026) are frontier-tier reasoning models from Google DeepMind. Both ship a 1M-token context window. On Google-Proof Q&A, Gemini 3.5 Flash leads by 8.9 pts. On pricing, Gemini 3.5 Flash-Lite costs $0.30/1M input tokens versus $1.50/1M 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.
Gemini 3.5 Flash-Lite is ~400% cheaper at $0.30/1M; pay for Gemini 3.5 Flash only for coding workflow support.
Decision scorecard
Local evidence first| Signal | Gemini 3.5 Flash | Gemini 3.5 Flash-Lite |
|---|---|---|
| Best for | reasoning-heavy apps, multimodal apps, and tool-calling agents | reasoning-heavy apps, multimodal apps, and tool-calling agents |
| Decision fit | Coding, RAG, and Agents | Coding, RAG, and Agents |
| Context window | 1M | 1M |
| Cheapest output | $9/1M tokens | $2.50/1M tokens |
| Provider routes | 4 tracked | 2 tracked |
| Shared benchmarks | Google-Proof Q&A leader | 2 shared |
Decision tradeoffs
- Gemini 3.5 Flash holds a shared-benchmark lead on Google-Proof Q&A, ahead by 8.9 points.
- Gemini 3.5 Flash has broader tracked provider coverage for fallback and route flexibility.
- Local decision data tags Gemini 3.5 Flash for Coding, RAG, and Agents.
- Gemini 3.5 Flash-Lite has the lower cheapest tracked output price at $2.50/1M tokens.
- Local decision data tags Gemini 3.5 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.
Gemini 3.5 Flash
$3,450
Cheapest tracked route/tier: Google AI Studio
Gemini 3.5 Flash-Lite
$865
Cheapest tracked route/tier: Google AI Studio
Estimated monthly gap: $2,585. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on Google AI Studio and OpenRouter; start route-level A/B tests there.
- Gemini 3.5 Flash-Lite is $6.50/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Provider overlap exists on Google AI Studio and OpenRouter; start route-level A/B tests there.
- Gemini 3.5 Flash is $6.50/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-05-19 | 2026-07-21 |
| Context window | 1M | 1M |
| Parameters | — | — |
| Architecture | Decoder Only | - |
| License | Proprietary | Proprietary |
| Openness | Proprietary | Proprietary |
| Weights | Not released | Not released |
| Code | Unknown | Unknown |
| Commercial use | Restricted | Restricted |
| Knowledge cutoff | 2025-01 | - |
Pricing and availability
| Pricing attribute | Gemini 3.5 Flash | Gemini 3.5 Flash-Lite |
|---|---|---|
| Input price | $1.50/1M tokens | $0.30/1M tokens |
| Output price | $9/1M tokens | $2.50/1M tokens |
| Providers |
Capabilities
| Capability | Gemini 3.5 Flash | Gemini 3.5 Flash-Lite |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | Yes |
| Reasoning | Yes | Yes |
| JSON / Tool use | Yes | Yes |
| Structured outputs | Yes | Yes |
| Code execution | Yes | Yes |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
| Benchmark | Gemini 3.5 Flash | Gemini 3.5 Flash-Lite |
|---|---|---|
| Google-Proof Q&A | 92.2 | 83.3 |
| ARC-AGI-2 | 72.1 | 10.3 |
Deep dive
On shared benchmark coverage, Google-Proof Q&A has Gemini 3.5 Flash at 92.2 and Gemini 3.5 Flash-Lite at 83.3, with Gemini 3.5 Flash ahead by 8.9 points; ARC-AGI-2 has Gemini 3.5 Flash at 72.1 and Gemini 3.5 Flash-Lite at 10.3, with Gemini 3.5 Flash ahead by 61.8 points. The largest visible gap is 61.8 points on ARC-AGI-2, 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 is close: both models cover vision, multimodal input, reasoning mode, JSON / Tool use, and JSON / Tool use. That makes context budget, benchmark fit, and provider maturity more important than a simple checklist. If your application depends on one integration detail, verify it against the provider route you plan to use, not just the base model listing.
For cost, Gemini 3.5 Flash lists $1.50/1M input and $9/1M output tokens on the cheapest tracked provider, while Gemini 3.5 Flash-Lite lists $0.30/1M input and $2.50/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Gemini 3.5 Flash-Lite lower by about $2.79 per million blended tokens. Availability is 4 providers versus 2, so concentration risk also matters.
Choose Gemini 3.5 Flash when coding workflow support and broader provider choice are central to the workload. Choose Gemini 3.5 Flash-Lite when coding workflow support 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, Gemini 3.5 Flash or Gemini 3.5 Flash-Lite?
Gemini 3.5 Flash supports 1M tokens, while Gemini 3.5 Flash-Lite 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, Gemini 3.5 Flash or Gemini 3.5 Flash-Lite?
Gemini 3.5 Flash-Lite is cheaper on tracked token pricing. Gemini 3.5 Flash costs $1.50/1M input and $9/1M output tokens. Gemini 3.5 Flash-Lite costs $0.30/1M input and $2.50/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Gemini 3.5 Flash or Gemini 3.5 Flash-Lite open source?
Gemini 3.5 Flash is listed under Proprietary. Gemini 3.5 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, Gemini 3.5 Flash or Gemini 3.5 Flash-Lite?
Both Gemini 3.5 Flash and Gemini 3.5 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, Gemini 3.5 Flash or Gemini 3.5 Flash-Lite?
Both Gemini 3.5 Flash and Gemini 3.5 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 Gemini 3.5 Flash and Gemini 3.5 Flash-Lite?
Gemini 3.5 Flash is available on Google AI Studio, GCP Vertex AI, Vercel AI Gateway, and OpenRouter. Gemini 3.5 Flash-Lite is available on Google AI Studio and OpenRouter. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
Continue comparing
- Claude Sonnet 4.6 vs Gemini 3.5 Flash
- Composer 2.5 vs Gemini 3.5 Flash
- Claude Opus 4.7 vs Gemini 3.5 Flash
- DeepSeek V4 Pro vs Gemini 3.5 Flash
- Claude Opus 4.6 vs Gemini 3.5 Flash
- Gemini 3.5 Flash vs GPT-5.5
- Gemini 3.5 Flash vs Grok 4
- Gemini 2.5 Flash vs Gemini 3.5 Flash
- DeepSeek V4 Flash vs Gemini 3.5 Flash
Popular comparisons for Gemini 3.5 Flash
Last reviewed: 2026-07-21. Data sourced from public model cards and provider documentation.