Grok-3 vs Qwen2.5-72B
Grok-3 (2026) and Qwen2.5-72B (2025) are frontier reasoning models from xAI and Alibaba. Grok-3 ships a 1M-token context window, while Qwen2.5-72B ships a 128k-token context window. On MMLU PRO, Grok-3 leads by 7.9 pts. 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-3 fits 8x more tokens; pick it for long-context work and Qwen2.5-72B for tighter calls.
Specs
| Released | 2026-01-15 | 2025-10-10 |
| Context window | 1M | 128k |
| Parameters | 1B | 72B |
| Architecture | - | - |
| License | Proprietary | Open Source |
| Knowledge cutoff | 2025-04 | 2024-09 |
Pricing and availability
| Grok-3 | Qwen2.5-72B | |
|---|---|---|
| Input price | $0.8/1M tokens | - |
| Output price | $2.4/1M tokens | - |
| Providers | - |
Capabilities
| Grok-3 | Qwen2.5-72B | |
|---|---|---|
| Vision | ||
| Multimodal | ||
| Reasoning | ||
| Function calling | ||
| Tool use | ||
| Structured outputs | ||
| Code execution |
Benchmarks
| Benchmark | Grok-3 | Qwen2.5-72B |
|---|---|---|
| MMLU PRO | 79.9 | 72.0 |
Deep dive
On shared benchmark coverage, MMLU PRO has Grok-3 at 79.9 and Qwen2.5-72B at 72, with Grok-3 ahead by 7.9 points. The largest visible gap is 7.9 points on MMLU PRO, which matters most when that benchmark mirrors your workload. Treat isolated benchmark wins as directional, because provider routing, prompt style, and tool access can move real application results.
The capability footprint differs most on vision: Grok-3, multimodal input: Grok-3, reasoning mode: Grok-3, and structured outputs: Grok-3. Both models share function calling and tool use, 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-3 has $0.8/1M input tokens and Qwen2.5-72B 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 Grok-3 when reasoning depth, larger context windows, and broader provider choice are central to the workload. Choose Qwen2.5-72B when provider fit are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship.
FAQ
Which has a larger context window, Grok-3 or Qwen2.5-72B?
Grok-3 supports 1M tokens, while Qwen2.5-72B supports 128k tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Is Grok-3 or Qwen2.5-72B open source?
Grok-3 is listed under Proprietary. Qwen2.5-72B is listed under Open Source. 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-3 or Qwen2.5-72B?
Grok-3 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, Grok-3 or Qwen2.5-72B?
Grok-3 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, Grok-3 or Qwen2.5-72B?
Grok-3 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 Grok-3 and Qwen2.5-72B?
Grok-3 is available on OpenRouter, xAI Console, and Chutes AI. Qwen2.5-72B 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: 2026-04-24. Data sourced from public model cards and provider documentation.