O-series reasoning model for hard analysis, math, coding, and planning
Specification
most-agreed values
Context
200K
Max output
100K
Released
2025-12-04
Knowledge cutoff
2024-06-30
Retires
—
Open weights
no
Input
text
Output
text
Price
US dollars per million tokens · most-agreed
Input
$1.10
Output
$4.40
Cache read
$0.275
Available from 3 hosts
| Host | In $/M | Out $/M | Cache rd | Cache wr | Context | Output | Retires |
|---|---|---|---|---|---|---|---|
| kilo | $1.10 | $4.40 | $0.275 | — | 200K | 100K | — |
| nano-gpt | $1.10 | $4.40 | $0.55 | — | 200K | 100K | — |
| openrouter | $1.10 | $4.40 | $0.275 | — | 200K | 100K | — |
Price history
append-only observations · a listing writes a row only when its price moves
| Date | Host | Field | $/M |
|---|---|---|---|
| 2026-09-02 | openrouter | Cache read | $0.275 |
| 2026-09-06 | openrouter | Cache read | $0.275 |
| 2026-09-02 | openrouter | Input | $1.10 |
| 2026-09-06 | openrouter | Input | $1.10 |
| 2026-09-02 | openrouter | Output | $4.40 |
| 2026-09-06 | openrouter | Output | $4.40 |
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