Nano Banana (Gemini 2.5 Flash Image) vs Grok 4
Nano Banana (Gemini 2.5 Flash Image) (2025) and Grok 4 (2025) are frontier reasoning models from Google DeepMind and xAI. Nano Banana (Gemini 2.5 Flash Image) ships a 33k-token context window, while Grok 4 ships a 256k-token context window. On pricing, Nano Banana (Gemini 2.5 Flash Image) costs $0.30/1M input tokens versus $1.25/1M 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.
Nano Banana (Gemini 2.5 Flash Image) is ~317% cheaper at $0.30/1M; pay for Grok 4 only for coding workflow support.
Decision scorecard
Local evidence first| Signal | Nano Banana (Gemini 2.5 Flash Image) | Grok 4 |
|---|---|---|
| Best for | provider-routed production | reasoning-heavy apps, multimodal apps, and tool-calling agents |
| Decision fit | General | Coding, RAG, and Agents |
| Context window | 33k | 256k |
| Cheapest output | $30/1M tokens | $2.50/1M tokens |
| Provider routes | 4 tracked | 4 tracked |
| Shared benchmarks | 0 shared | 0 shared |
Decision tradeoffs
- Use Nano Banana (Gemini 2.5 Flash Image) when your own prompt tests beat the comparison signals; the local data does not show a decisive standalone advantage yet.
- Grok 4 has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Grok 4 has the lower cheapest tracked output price at $2.50/1M tokens.
- Grok 4 uniquely exposes Vision, Multimodal, and Reasoning in local model data.
- Local decision data tags Grok 4 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.
Nano Banana (Gemini 2.5 Flash Image)
$7,740
Cheapest tracked route/tier: Google AI Studio
Grok 4
$1,625
Cheapest tracked route/tier: xAI Console
Estimated monthly gap: $6,115. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- Grok 4 is $27.50/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Grok 4 adds Vision, Multimodal, and Reasoning in local capability data.
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- Nano Banana (Gemini 2.5 Flash Image) is $27.50/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Check replacement coverage for Vision, Multimodal, and Reasoning before moving production traffic.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-04-01 | 2025-07-09 |
| Context window | 33k | 256k |
| Parameters | — | — |
| Architecture | Decoder Only | 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 | - | - |
Pricing and availability
| Pricing attribute | Nano Banana (Gemini 2.5 Flash Image) | Grok 4 |
|---|---|---|
| Input price | $0.30/1M tokens | $1.25/1M tokens |
| Output price | $30/1M tokens | $2.50/1M tokens |
| Providers |
Capabilities
| Capability | Nano Banana (Gemini 2.5 Flash Image) | Grok 4 |
|---|---|---|
| Vision | No | Yes |
| Multimodal | No | Yes |
| Reasoning | No | Yes |
| JSON / Tool use | No | Yes |
| Structured outputs | No | Yes |
| Code execution | No | Yes |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
No shared benchmark scores are currently available for this pair.
Continue comparing
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Last reviewed: 2026-07-10. Data sourced from public model cards and provider documentation.