$ diff grok-4-6 gpt-5-6-sol
Grok 4.6 vs GPT-5.6 Sol
Values come from Grok 4.6 and GPT-5.6 Sol, where each is cited to its source. This page states no benchmark result and ranks neither model — it puts two published specifications next to each other. Where a lab has not published a figure, the row says so rather than guessing.
xAIGrok 4.6
- context
- 500K
- weights
- closed
- $/M in
- $2
- $/M out
- $6
- context
- 1.1M
- weights
- closed
- $/M in
- $5
- $/M out
- $30
What actually differs
- Context window
- GPT-5.6 Sol takes 1.1M against 500K — 2.1× more room in a single request.
- Input price
- Grok 4.6 at $2/M against $5/M — 2.5× cheaper to feed. Standard rates: one of these labs also quotes a lower cached-input tier, which applies only when a prefix is reused — see the full spec below.
- Output price
- Grok 4.6 at $6/M against $30/M — 5.0× cheaper to generate. Output dominates the bill on most agentic workloads, where the model writes far more than it reads.
- Recency
- Grok 4.6 shipped 29 days after GPT-5.6 Sol (2026-08-07 vs 2026-07-09).
Full spec
| Attribute | Grok 4.6 | GPT-5.6 Sol |
|---|---|---|
| Developer | xAI | OpenAI |
| Released | 2026-08-07 | 2026-07-09 |
| Context window | 500,000 tokens | 1.05M tokens |
| Pricing | $2/M input · $6/M output; a request reaching 200K tokens re-prices in full at $4.00/M input · $1.00/M cached input · $12.00/M output | $5/M input · $30/M output (Sol; family tiers below) |
| License | proprietary | proprietary (API-only; no weight release) |
| Availability | API | ChatGPT (subscription), API |