GPT-5.6 Sol vs Grok 4.5
Side-by-side comparison of API pricing, specs, benchmarks, and capabilities
Grok 4.5 is 77.1% cheaper on blended cost ($4.00 vs $17.50/Mtok)
|
Oby OpenAI
|
Xby xAI
|
|
|---|---|---|
| Overview | ||
| Status | Current flagship | Current flagship |
| Released | Jul 9, 2026 | Jul 8, 2026 |
| Pricing per million tokens | ||
| Input | $5.00/Mtok | $2.00/Mtok |
| Output | $30.00/Mtok | $6.00/Mtok |
| Blended avg | $17.50/Mtok | $4.00/Mtok |
| Cached input | $0.500/Mtok | — |
| Specifications | ||
| Context window | 1M tokens | 500K tokens |
| Parameters | Proprietary | Proprietary |
| Speed (TPS) | — | — |
| Modalities | ||
| Input |
textimage
|
textimage
|
| Providers | ||
| Available from |
OpenAI — $5.00/$30.00/Mtok
|
xAI — $2.00/$6.00/Mtok
|
Cost at scale — 1M tokens (50/50 input/output)
| Volume | GPT-5.6 Sol | Grok 4.5 | Savings |
|---|---|---|---|
| 1M tokens | $17.5 | $4 | $13.5 (77.1%) |
| 10M tokens | $175 | $40 | $135 (77.1%) |
| 100M tokens | $1750 | $400 | $1350 (77.1%) |
| 1000M tokens | $17500 | $4000 | $13500 (77.1%) |
Try Grok 4.5 on xAI
The cheaper option here — Grok 4.5 costs $4.00/Mtok blended on xAI.
Summary
GPT-5.6 Sol by OpenAI costs $5.00/Mtok input and $30.00/Mtok output, with a 1M-token context window. It supports text, image input.
Grok 4.5 by xAI costs $2.00/Mtok input and $6.00/Mtok output, with a 500K-token context window. It supports text, image input.
On a blended cost basis, Grok 4.5 is 77.1% cheaper than GPT-5.6 Sol.
Note: Pricing is per million tokens. Actual costs vary with usage patterns, prompt caching, and batch discounts. Always verify against official provider pricing pages.