DeepSeek R1
legacyDeepSeek · Frontier
Open-weight reasoning model that stunned the industry at launch. Repriced with V3.2-Exp in September 2025; now routes to V4 Flash thinking mode and is scheduled for deprecation July 2026.
- Strengths
- Landmark open reasoning model that reset industry price expectations.
- Best for
- Reasoning experiments and reference work on open weights.
- Limitations
- Now routes to V4 Flash thinking mode; scheduled for deprecation July 2026.
Input / 1M
$0.28
Output / 1M
$0.42
Cached input / 1M
$0.028
Context window
128K
Where it sits
2nd-cheapest frontier model
by blended $/Mtok among 24 listed frontier models
91% below the frontier median
blended $/Mtok across 24 frontier models
Output costs 1.5× input
$0.28 in / $0.42 out per 1M
Cached input saves 90%
$0.028 vs $0.28 per 1M fresh
Down 67% since launch (Jan 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
Blended price change (3:1 I/O mix)
- 30d
- —
- 90d
- —
- 1y
- decreased 67.2%
- Since launch
- decreased 67.2%
Snapshots
| Effective | Input | Output | Cached in | Note | Source |
|---|---|---|---|---|---|
| 29 Sep 2025 | $0.28 | $0.42 | $0.028 | V3.2-Exp repricing, applied to deepseek-reasoner as well as V3 | api-docs.deepseek.com |
| 20 Jan 2025 | $0.55 | $2.19 | $0.14 | Launch pricing | api-docs.deepseek.com |