Compare
Gpt 4o Mini Audio Preview vs Grok 4.20
This page is context-first: how much text each model can take in one request. Full specs adds capabilities and limits; the pricing matrix below is only about $/million tokens from hosts that list both models.
Model
Gpt 4o Mini Audio Preview
Context window
128K
128,000 tokens · ~96K words
Model
Grok 4.20
Context window
2M
2,000,000 tokens · ~1.5M words
Context window · side by side
Bar length is relative to the larger of the two windows (100% = max of this pair). This is not pricing.
Grok 4.20 has about 15.6× the context window of the other in this pair.
Grok 4.20 has 1462% more context capacity (2000K vs 128K tokens).
Quick verdicts
Short takeaways — validate with your own workloads.
Long document processing
Use Grok 4.20. Its 2000K context fits entire documents without chunking (vs 128K).
Full specs
Context, output, capabilities, and dates. Green highlights the favorable value where we compute a winner.
| Spec | Gpt 4o Mini Audio Preview | Grok 4.20 |
|---|---|---|
| Context window | 128,000 tokens (128K) | 2,000,000 tokens (2000K) |
| Max output tokens | 16,384 tokens (16K) | N/A |
| Speed tier | Fast | Balanced |
| Vision | No | Yes |
| Function calling | Yes | Yes |
| Extended thinking | No | Yes |
| Prompt caching | No | Yes |
| Batch API | Yes | No |
| Release date | N/A | Mar 2026 |
Pricing matrix
Dollar rates only: hosts that list both models, per 1M tokens. For how much text fits, use the context section above — not this table.
| Provider | Gpt 4o Mini Audio Preview in | Gpt 4o Mini Audio Preview out | Grok 4.20 in | Grok 4.20 out |
|---|---|---|---|---|
| Openai | $0.150/M | $0.600/M | — | — |
Frequently asked questions
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Example: a multi-turn chat session
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