Gemini 2.5 Pro Preview 05-06 vs Grok 4.3 Beta
Gemini 2.5 Pro Preview 05-06 (2025) and Grok 4.3 Beta (2026) are frontier reasoning models from Google DeepMind and xAI. Gemini 2.5 Pro Preview 05-06 ships a 1M-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 is safer overall; choose Gemini 2.5 Pro Preview 05-06 when provider fit matters.
Specs
| Released | 2025-05-06 | 2026-04-17 |
| Context window | 1M | 2M |
| Parameters | — | ~0.5T |
| Architecture | decoder only | - |
| License | Unknown | Proprietary |
| Knowledge cutoff | - | - |
Pricing and availability
| Gemini 2.5 Pro Preview 05-06 | Grok 4.3 Beta | |
|---|---|---|
| Input price | $1.25/1M tokens | - |
| Output price | $10/1M tokens | - |
| Providers | - |
Capabilities
| Gemini 2.5 Pro Preview 05-06 | 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, and tool use: Grok 4.3 Beta. Both models share 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.
Pricing coverage is uneven: Gemini 2.5 Pro Preview 05-06 has $1.25/1M input tokens and Grok 4.3 Beta has no token price sourced yet. Provider availability is 1 tracked routes versus 0. Treat unknown pricing as an integration gap, then verify the route you will actually call before estimating production spend.
Choose Gemini 2.5 Pro Preview 05-06 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, Gemini 2.5 Pro Preview 05-06 or Grok 4.3 Beta?
Grok 4.3 Beta supports 2M tokens, while Gemini 2.5 Pro Preview 05-06 supports 1M tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Is Gemini 2.5 Pro Preview 05-06 or Grok 4.3 Beta open source?
Gemini 2.5 Pro Preview 05-06 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, Gemini 2.5 Pro Preview 05-06 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, Gemini 2.5 Pro Preview 05-06 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, Gemini 2.5 Pro Preview 05-06 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 Gemini 2.5 Pro Preview 05-06 and Grok 4.3 Beta?
Gemini 2.5 Pro Preview 05-06 is available on 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.
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Last reviewed: 2026-04-25. Data sourced from public model cards and provider documentation.