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S2.1 Pro (Free)
openai·openai/s2.1-pro-free·GA·Closed·o series·Speech / Audio·NEW
Speech generation model for controllable voice, narration, and audio delivery
At a glance
Reference pricePrice undisclosed
Lowest paidNo paid channels
Context0
Output limit0
Capabilities
ReasoningTool use? Structured output? TemperatureAttachments
Modalities
Text
Knowledge cutoff—
Released / updated2026-07-28 / 2026-07-28
Quality & performance
Artificial Analysis doesn't cover this model (267 of 2059 have data). Quality data comes from independent evals covering widely used models.
Available at 1 providers0 with public prices
| Provider | Tier | Input | Output | Cache read | Cache write | Context | Output limit | Status |
|---|---|---|---|---|---|---|---|---|
| Vercel AI Gateway | Cloud | — | — | — | — | 0 | 0 | hostTable.undisclosed |
Sorted by blended price (input×0.75 + output×0.25) asc. The official channel always shows regardless of rank. Whether a gateway's low price is actually usable can't be verified.
Your usage cost
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Price historyone sample accumulated per data sync
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