Grok 4.3 Beta vs o4-mini
Grok 4.3 Beta (2026) and o4-mini (2025) are frontier-tier reasoning models from xAI and OpenAI. Grok 4.3 Beta ships a 2M-token context window, while o4-mini ships a not-yet-sourced 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. The goal is to make the tradeoff clear before deeper testing.
Grok 4.3 Beta is safer overall; choose o4-mini when coding workflow support matters.
Specs
| Released | 2026-04-17 | 2025-04-16 |
| Context window | 2M | — |
| Parameters | ~0.5T | — |
| Architecture | - | decoder only |
| License | Proprietary | Proprietary |
| Knowledge cutoff | - | 2025-08 |
Pricing and availability
| Grok 4.3 Beta | o4-mini | |
|---|---|---|
| Input price | - | $0.5/1M tokens |
| Output price | - | $2/1M tokens |
| Providers | - |
Capabilities
| Grok 4.3 Beta | o4-mini | |
|---|---|---|
| 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 code execution: o4-mini. Both models share vision, multimodal input, reasoning mode, and function calling, 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: Grok 4.3 Beta has no token price sourced yet and o4-mini has $0.5/1M input tokens. Provider availability is 0 tracked routes versus 4. Treat unknown pricing as an integration gap, then verify the route you will actually call before estimating production spend.
Choose Grok 4.3 Beta when vision-heavy evaluation are central to the workload. Choose o4-mini when coding workflow support and broader provider choice 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. It also helps separate model capability from provider packaging, which can change cost and latency. For teams standardizing a stack, that distinction is often the difference between a benchmark win and a reliable deployment.
FAQ
Is Grok 4.3 Beta or o4-mini open source?
Grok 4.3 Beta is listed under Proprietary. o4-mini 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, Grok 4.3 Beta or o4-mini?
Both Grok 4.3 Beta and o4-mini expose vision. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Which is better for multimodal input, Grok 4.3 Beta or o4-mini?
Both Grok 4.3 Beta and o4-mini expose multimodal input. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Which is better for reasoning mode, Grok 4.3 Beta or o4-mini?
Both Grok 4.3 Beta and o4-mini expose reasoning mode. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Which is better for function calling, Grok 4.3 Beta or o4-mini?
Both Grok 4.3 Beta and o4-mini expose function calling. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Where can I run Grok 4.3 Beta and o4-mini?
Grok 4.3 Beta is available on the tracked providers still being sourced. o4-mini is available on OpenAI API, OpenRouter, OpenAI Batch API, and Replicate API. 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.