token.app › Compare › GPT Audio vs Grok 4.5
GPT Audio vs Grok 4.5
Grok 4.5 is 1.5× cheaper per token on a blended 3:1 basis. Grok 4.5 accepts the larger context window (500K).
Head to head
Blended price uses a 3:1 input:output mix
| GPT Audio | Grok 4.5 | |
|---|---|---|
| Provider | OpenAI | xAI |
| Input $/1M | $2.50 | $2.00 |
| Output $/1M | $10.00 | $6.00 |
| Blended $/1M | $4.38 | $3.00 |
| Context window | 128K | 500K |
| Max output | 16K | — |
| Released | Jan 2026 | Jul 2026 |
| Licence | Proprietary | Proprietary |
Choose GPT Audio if…
- No clear advantage on the data we hold.
Choose Grok 4.5 if…
- Costs less per token — $3.00 vs $4.38 blended
- Larger context window (500K)
- Newer model (released Jul 2026)
FAQ
Which is better, GPT Audio or Grok 4.5?
We do not hold independently-run benchmark scores covering both GPT Audio and Grok 4.5, so we make no quality claim. Their pricing and specifications are compared on this page.
Is GPT Audio cheaper than Grok 4.5?
Grok 4.5 is cheaper: $3.00 versus $4.38 per million tokens blended at 3:1 input:output. Input alone: $2.50 vs $2.00. Output alone: $10.00 vs $6.00.
What context windows do GPT Audio and Grok 4.5 have?
GPT Audio: 128,000 tokens. Grok 4.5: 500,000 tokens.
Who makes GPT Audio and Grok 4.5?
GPT Audio is made by OpenAI. Grok 4.5 is made by xAI.