o3
OpenAI · Frontier
OpenAI's frontier reasoning model. Received an 80% price cut in June 2025 alongside the o3-pro launch.
- Strengths
- Strong dedicated step-by-step reasoning.
- Best for
- Math, logic and multi-step problem solving.
- Limitations
- Reasoning-focused; the GPT-5 line now covers most of its ground.
Input / 1M
$2.00
Output / 1M
$8.00
Cached input / 1M
$0.5
Context window
200K
Where it sits
12th-cheapest frontier model
by blended $/Mtok among 24 listed frontier models
Right at the frontier median
blended $/Mtok across 24 frontier models
Output costs 4× input
$2.00 in / $8.00 out per 1M
Cached input saves 75%
$0.5 vs $2.00 per 1M fresh
Down 80% since launch (Apr 2025)
blended price vs launch
Computed live from current prices and this model's history — not hand-written, so it stays accurate as prices move.
Price history
Input (solid)Output (dashed)
Blended price change (3:1 I/O mix)
- 30d
- —
- 90d
- —
- 1y
- —
- Since launch
- decreased 80.0%
Snapshots
| Effective | Input | Output | Cached in | Note | Source |
|---|---|---|---|---|---|
| 10 Jun 2025 | $2.00 | $8.00 | $0.5 | 80% price cut alongside o3-pro launch | openai.com/api/pricing |
| 16 Apr 2025 | $10.00 | $40.00 | $2.50 | Launch pricing | openai.com/api/pricing |