Head-to-head
ChatGPT‑6 vs Grok 4.6
Grok 4.6 is fast and plugged into X; ChatGPT-6 answers with higher quality and a free preview, trading away raw speed.
xAI
Grok 4.6 is quick, agentic and cheap, with native access to real-time X data. ChatGPT-6 answers with higher composite intelligence and coding scores and a free preview, at the cost of raw throughput. If your work is latency-sensitive or depends on live social data, Grok is the pick; if it's reasoning and coding quality on a budget, ChatGPT-6 wins comfortably.
Side by side
The same figures from our full benchmark table, narrowed to two columns.
| Metric | ChatGPT-6 | Grok 4.6 |
|---|---|---|
| Intelligence Index | 71* | 65 |
| Agentic coding | 86* | 76 |
| Context window | 400K | 500K |
| Max output | 128K | 64K |
| Throughput (tps) | 58* | 120 |
| Price / 1M out | $0 | $6 |
| Multimodal | ||
| Open weights | ||
| Free to use |
- Free during preview vs $6 per million output tokens
- Higher composite intelligence and coding score
- Double the max output (128K vs 64K tokens)
- No account required to start
- Much higher throughput (tokens per second)
- Native, real-time access to X data
- Lower latency for quick back-and-forth
Which should you choose?
You want the strongest reasoning and coding for free, and latency isn't critical.
You want the fastest responses or live data from X.
Try ChatGPT-6 free
No account, no card, no app — open the chat and compare for yourself.