Grok-3 vs Qwen2.5-72B-Instruct
Grok-3 (2026) and Qwen2.5-72B-Instruct (2024) are frontier reasoning models from xAI and Alibaba. Grok-3 ships a 1M-token context window, while Qwen2.5-72B-Instruct ships a 128K-token context window. On Chatbot Arena, Grok-3 leads by 135 pts. On pricing, Qwen2.5-72B-Instruct costs $0.12/1M input tokens versus $0.8/1M 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.
Qwen2.5-72B-Instruct is ~567% cheaper at $0.12/1M; pay for Grok-3 only for reasoning depth.
Specs
| Released | 2026-01-15 | 2024-06-07 |
| Context window | 1M | 128K |
| Parameters | 1B | 72.7B |
| Architecture | - | decoder only |
| License | Proprietary | Apache 2.0 |
| Knowledge cutoff | 2025-04 | - |
Pricing and availability
| Grok-3 | Qwen2.5-72B-Instruct | |
|---|---|---|
| Input price | $0.8/1M tokens | $0.12/1M tokens |
| Output price | $2.4/1M tokens | $0.39/1M tokens |
| Providers |
Capabilities
| Grok-3 | Qwen2.5-72B-Instruct | |
|---|---|---|
| Vision | ||
| Multimodal | ||
| Reasoning | ||
| Function calling | ||
| Tool use | ||
| Structured outputs | ||
| Code execution |
Benchmarks
| Benchmark | Grok-3 | Qwen2.5-72B-Instruct |
|---|---|---|
| Chatbot Arena | 1405.0 | 1270.0 |
Deep dive
On shared benchmark coverage, Chatbot Arena has Grok-3 at 1405 and Qwen2.5-72B-Instruct at 1270, with Grok-3 ahead by 135 points. The largest visible gap is 135 points on Chatbot Arena, 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, function calling: Grok-3, and tool use: Grok-3. 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.
For cost, Grok-3 lists $0.8/1M input and $2.4/1M output tokens, while Qwen2.5-72B-Instruct lists $0.12/1M input and $0.39/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Qwen2.5-72B-Instruct lower by about $1.08 per million blended tokens. Availability is 3 providers versus 7, so concentration risk also matters.
Choose Grok-3 when reasoning depth and larger context windows are central to the workload. Choose Qwen2.5-72B-Instruct when provider fit, lower input-token cost, 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.
FAQ
Which has a larger context window, Grok-3 or Qwen2.5-72B-Instruct?
Grok-3 supports 1M tokens, while Qwen2.5-72B-Instruct 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.
Which is cheaper, Grok-3 or Qwen2.5-72B-Instruct?
Qwen2.5-72B-Instruct is cheaper on tracked token pricing. Grok-3 costs $0.8/1M input and $2.4/1M output tokens. Qwen2.5-72B-Instruct costs $0.12/1M input and $0.39/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Grok-3 or Qwen2.5-72B-Instruct open source?
Grok-3 is listed under Proprietary. Qwen2.5-72B-Instruct is listed under Apache 2.0. 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-Instruct?
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-Instruct?
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.
Where can I run Grok-3 and Qwen2.5-72B-Instruct?
Grok-3 is available on OpenRouter, xAI Console, and Chutes AI. Qwen2.5-72B-Instruct is available on DeepInfra, OpenRouter, Fireworks AI, Novita AI, and Chutes AI. 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.