Nano Banana (Gemini 2.5 Flash Image) vs Grok 4.3 Beta
Nano Banana (Gemini 2.5 Flash Image) (2025) and Grok 4.3 Beta (2026) are frontier reasoning models from Google DeepMind and xAI. Nano Banana (Gemini 2.5 Flash Image) ships a 33K-token context window, while Grok 4.3 Beta ships a 2M-token context window. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit. It focuses on practical selection signals rather than broad model-family marketing.
Grok 4.3 Beta fits 61x more tokens; pick it for long-context work and Nano Banana (Gemini 2.5 Flash Image) for tighter calls.
Specs
| Released | 2025-04-01 | 2026-04-17 |
| Context window | 33K | 2M |
| Parameters | — | ~0.5T |
| Architecture | decoder only | - |
| License | Unknown | Proprietary |
| Knowledge cutoff | - | - |
Pricing and availability
| Nano Banana (Gemini 2.5 Flash Image) | Grok 4.3 Beta | |
|---|---|---|
| Input price | $0.3/1M tokens | - |
| Output price | $30/1M tokens | - |
| Providers | - |
Capabilities
| Nano Banana (Gemini 2.5 Flash Image) | Grok 4.3 Beta | |
|---|---|---|
| Vision | ||
| Multimodal | ||
| Reasoning | ||
| Function calling | ||
| Tool use | ||
| Structured outputs | ||
| Code execution |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on vision: Grok 4.3 Beta, multimodal input: Grok 4.3 Beta, reasoning mode: Grok 4.3 Beta, function calling: Grok 4.3 Beta, tool use: Grok 4.3 Beta, and structured outputs: Grok 4.3 Beta. Both models share the core language-model surface, 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.
Pricing coverage is uneven: Nano Banana (Gemini 2.5 Flash Image) has $0.3/1M input tokens and Grok 4.3 Beta has no token price sourced yet. Provider availability is 3 tracked routes versus 0. Treat unknown pricing as an integration gap, then verify the route you will actually call before estimating production spend.
Choose Nano Banana (Gemini 2.5 Flash Image) when provider fit and broader provider choice are central to the workload. Choose Grok 4.3 Beta when reasoning depth and larger context windows 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, Nano Banana (Gemini 2.5 Flash Image) or Grok 4.3 Beta?
Grok 4.3 Beta supports 2M tokens, while Nano Banana (Gemini 2.5 Flash Image) supports 33K tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Is Nano Banana (Gemini 2.5 Flash Image) or Grok 4.3 Beta open source?
Nano Banana (Gemini 2.5 Flash Image) is listed under Unknown. Grok 4.3 Beta 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, Nano Banana (Gemini 2.5 Flash Image) or Grok 4.3 Beta?
Grok 4.3 Beta 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, Nano Banana (Gemini 2.5 Flash Image) or Grok 4.3 Beta?
Grok 4.3 Beta 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.
Which is better for reasoning mode, Nano Banana (Gemini 2.5 Flash Image) or Grok 4.3 Beta?
Grok 4.3 Beta has the clearer documented reasoning mode signal in this comparison. If reasoning mode is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run Nano Banana (Gemini 2.5 Flash Image) and Grok 4.3 Beta?
Nano Banana (Gemini 2.5 Flash Image) is available on Google AI Studio, GCP Vertex AI, and OpenRouter. Grok 4.3 Beta is available on the tracked providers still being sourced. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
Continue comparing
Last reviewed: 2026-04-25. Data sourced from public model cards and provider documentation.