Head to head
Grok 4.5 vs Mistral Large 3
Grok 4.5 (xAI) and Mistral Large 3 (Mistral) compared on intelligence, speed, context, and price — and which to choose. Both run on just4o.chat from one chat.
| Metric | Grok 4.5 | Mistral Large 3 |
|---|---|---|
| Intelligence (AA index) | — | 16 |
| Output speed (tokens/sec) | — | 49.1 |
| Context window | 500K ✓ | 256K |
| Max output | — | — |
| Input price / 1M | $2 | $0.5 ✓ |
| Output price / 1M | $6 | $1.5 ✓ |
| Released | 2026-07-08 | 2025-12 |
Choose Grok 4.5 if you want…
- Larger context window (500K)
Choose Mistral Large 3 if you want…
- Lower price ($0.75 / 1M blended)
Mistral Large 3
Mistral Large 3 is the French lab's flagship dense model, and on just4o.chat it runs through the Vercel AI Gateway under the mistral/mistral-large-3 route. It pairs strong general reasoning with the multilingual fluency Mistral is known for — European languages in particular — and reliable function calling for tool-driven workflows. A 256k-token context window is roomy enough for long documents, multi-file code, or extended chats without truncation, and at $0.50 per million input and $1.50 per million output tokens it sits at the affordable end of frontier-class models. On just4o.chat it is a base-tier model available on every plan, billed at 2 base requests per send before length multipliers. One practical note worth flagging up front: like the rest of the Mistral lineup here, it has no native web search, and it is text-only — no image input. For teams that want a capable, cost-disciplined generalist with first-rate multilingual handling, it is an easy default.
Full Mistral Large 3 details →FAQ
Which is better, Grok 4.5 or Mistral Large 3?
Grok 4.5 leads on 1 of the headline metrics (larger context window (500k)), while Mistral Large 3 wins on lower price ($0.75 / 1m blended). The right pick depends on whether you prioritise capability, speed, or cost.
Is Grok 4.5 or Mistral Large 3 cheaper?
Mistral Large 3 is cheaper at $0.75 per 1M tokens (blended), versus $3.
Can I use both Grok 4.5 and Mistral Large 3?
Yes. Both are available on just4o.chat from a single chat — you can switch between them per message with no separate subscriptions.