O-series reasoning model for hard analysis, math, coding, and planning
Specification
xai listing
Context
1M
Max output
1M
Released
2026-03-09
Knowledge cutoff
2025-09
Retires
2027-04-06
Open weights
no
Input
text, image
Output
text
Price
US dollars per million tokens · xai list price
Input
$1.25
Output
$2.50
Cache read
$0.20
Long-context price tiers
the rate above each context threshold
| Above | Price | $/M |
|---|---|---|
| 200K | Cache read | $0.40 |
| 200K | Input | $2.50 |
| 200K | Output | $5.00 |
Available from 9 hosts
| Host | In $/M | Out $/M | Cache rd | Cache wr | Context | Output | Retires |
|---|---|---|---|---|---|---|---|
| xaivendor | $1.25 | $2.50 | $0.20 | — | 1M | 1M | — |
| azure_ai | $1.25 | $2.50 | $1.25 | — | 262K | 8K | 2027-04-06 |
| google-vertex | $1.25 | $2.50 | $0.20 | — | 2M | 30K | — |
| llmgateway | $1.25 | $2.50 | $0.20 | — | 2M | 30K | — |
| llmgateway-providers · vertex-openai | $1.25 | $2.50 | $0.20 | — | 2M | 30K | — |
| perplexity | $1.25 | $2.50 | $0.20 | — | — | — | — |
| vercel · spacexai | $1.25 | $2.50 | $0.20 $0.40 | — | 2M | 2M | — |
| vertex_ai | $1.25 | $2.50 | $0.20 | — | 2M | 2M | — |
| azure | $2.00 | $6.00 | — | — | 262K | 8K | — |
Price history
append-only observations · a listing writes a row only when its price moves
| Date | Host | Field | $/M |
|---|---|---|---|
| 2026-09-02 | vercel · spacexai | Cache read | $0.40 |
| 2026-09-04 | vercel · spacexai | Cache read | $0.20 |
| 2026-09-02 | vertex_ai | Input | $2.00 |
| 2026-09-11 | vertex_ai | Input | $1.25 |
| 2026-09-02 | vertex_ai | Output | $6.00 |
| 2026-09-11 | vertex_ai | Output | $2.50 |
More from xAI
most-hosted first