Gemini 3.5 Flash vs Gemini 3.6 Flash
Gemini 3.5 Flash (2026) and Gemini 3.6 Flash (2026) are frontier-tier reasoning models from Google DeepMind. Both ship a 1.05m-token context window. On Google-Proof Q&A, Gemini 3.6 Flash leads by 1.9 pts. On pricing, Gemini 3.6 Flash costs $0.75/1M 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 3.6 Flash is ~100% cheaper at $0.75/1M; pay for Gemini 3.5 Flash only for coding workflow support.
Decision scorecard
Local evidence first| Signal | Gemini 3.5 Flash | Gemini 3.6 Flash |
|---|---|---|
| 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 | 1.05m | 1.05m |
| Cheapest output | $9/1M tokens | $3.75/1M tokens |
| Provider routes | 4 tracked | 2 tracked |
| Shared benchmarks | 2 shared | Google-Proof Q&A leader |
Decision tradeoffs
- Gemini 3.5 Flash holds a shared-benchmark lead on ARC-AGI-2, ahead by 11.7 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 3.6 Flash holds a shared-benchmark lead on Google-Proof Q&A, ahead by 1.9 points.
- Gemini 3.6 Flash has the lower cheapest tracked output price at $3.75/1M tokens.
- Local decision data tags Gemini 3.6 Flash 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 3.6 Flash
$1,538
Cheapest tracked route/tier: OpenRouter
Estimated monthly gap: $1,913. 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 3.6 Flash is $5.25/1M 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 $5.25/1M 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 | 1.05m | 1.05m |
| Parameters | — | — |
| Architecture | Decoder Only | - |
| License | Proprietary | Proprietary |
| Openness | Proprietary | Proprietary |
| Weights | Not released | Not released |
| Code | Unknown | Unknown |
| Commercial use | Commercial use: conditional | Commercial use: conditional |
| Knowledge cutoff | 2025-01 | - |
Pricing and availability
| Pricing attribute | Gemini 3.5 Flash | Gemini 3.6 Flash |
|---|---|---|
| Input price | $1.50/1M tokens | $0.75/1M tokens |
| Output price | $9/1M tokens | $3.75/1M tokens |
| Providers |
Capabilities
| Capability | Gemini 3.5 Flash | Gemini 3.6 Flash |
|---|---|---|
| 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 3.6 Flash |
|---|---|---|
| Google-Proof Q&A | 92.2 | 94.1 |
| ARC-AGI-2 | 72.1 | 60.4 |
Continue comparing
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Last reviewed: 2026-07-21. Data sourced from public model cards and provider documentation.