GPT-5.4 Pro vs Grok 3 Mini
GPT-5.4 Pro (2026) and Grok 3 Mini (2025) are frontier reasoning models from OpenAI and xAI. GPT-5.4 Pro ships a 1.1M-token context window, while Grok 3 Mini ships a 131k-token context window. On pricing, Grok 3 Mini costs $0.25/1M input tokens versus $30/1M for the alternative. 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 3 Mini is ~11900% cheaper at $0.25/1M; pay for GPT-5.4 Pro only for coding workflow support.
Decision scorecard
Local evidence first| Signal | GPT-5.4 Pro | Grok 3 Mini |
|---|---|---|
| Decision fit | Coding, RAG, and Agents | RAG, Long context, and Vision |
| Context window | 1.1M | 131k |
| Cheapest output | $180/1M tokens | $1.27/1M tokens |
| Provider routes | 2 tracked | 2 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- GPT-5.4 Pro has the larger context window for long prompts, retrieval packs, or transcript analysis.
- GPT-5.4 Pro uniquely exposes Vision, Reasoning, and Function calling in local model data.
- Local decision data tags GPT-5.4 Pro for Coding, RAG, and Agents.
- Grok 3 Mini has the lower cheapest tracked output price at $1.27/1M tokens.
- Local decision data tags Grok 3 Mini for RAG, Long context, and Vision.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output prices on this page.
GPT-5.4 Pro
$69,000
Cheapest tracked route: OpenRouter
Grok 3 Mini
$518
Cheapest tracked route: Microsoft Foundry
Estimated monthly gap: $68,483. Batch, cache, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- Grok 3 Mini is $179/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Vision, Reasoning, and Function calling before moving production traffic.
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- GPT-5.4 Pro is $179/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- GPT-5.4 Pro adds Vision, Reasoning, and Function calling in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-03-01 | 2025-02-17 |
| Context window | 1.1M | 131k |
| Parameters | — | — |
| Architecture | decoder only | - |
| License | Proprietary | Proprietary |
| Knowledge cutoff | 2025-08 | 2024-11 |
Pricing and availability
| Pricing attribute | GPT-5.4 Pro | Grok 3 Mini |
|---|---|---|
| Input price | $30/1M tokens | $0.25/1M tokens |
| Output price | $180/1M tokens | $1.27/1M tokens |
| Providers |
Capabilities
| Capability | GPT-5.4 Pro | Grok 3 Mini |
|---|---|---|
| Vision | Yes | No |
| Multimodal | Yes | Yes |
| Reasoning | Yes | No |
| Function calling | Yes | No |
| Tool use | Yes | No |
| Structured outputs | Yes | Yes |
| Code execution | Yes | No |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on vision: GPT-5.4 Pro, reasoning mode: GPT-5.4 Pro, function calling: GPT-5.4 Pro, tool use: GPT-5.4 Pro, and code execution: GPT-5.4 Pro. Both models share multimodal input and 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.
For cost, GPT-5.4 Pro lists $30/1M input and $180/1M output tokens, while Grok 3 Mini lists $0.25/1M input and $1.27/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Grok 3 Mini lower by about $74.44 per million blended tokens. Availability is 2 providers versus 2, so concentration risk also matters.
Choose GPT-5.4 Pro when coding workflow support and larger context windows are central to the workload. Choose Grok 3 Mini when provider fit and lower input-token cost 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, GPT-5.4 Pro or Grok 3 Mini?
GPT-5.4 Pro supports 1.1M tokens, while Grok 3 Mini supports 131k tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Which is cheaper, GPT-5.4 Pro or Grok 3 Mini?
Grok 3 Mini is cheaper on tracked token pricing. GPT-5.4 Pro costs $30/1M input and $180/1M output tokens. Grok 3 Mini costs $0.25/1M input and $1.27/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is GPT-5.4 Pro or Grok 3 Mini open source?
GPT-5.4 Pro is listed under Proprietary. Grok 3 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, GPT-5.4 Pro or Grok 3 Mini?
GPT-5.4 Pro 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. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Which is better for multimodal input, GPT-5.4 Pro or Grok 3 Mini?
Both GPT-5.4 Pro and Grok 3 Mini expose multimodal input. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface.
Where can I run GPT-5.4 Pro and Grok 3 Mini?
GPT-5.4 Pro is available on OpenRouter and OpenAI API. Grok 3 Mini is available on OpenRouter and Microsoft Foundry. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
Continue comparing
Last reviewed: 2026-05-19. Data sourced from public model cards and provider documentation.