OpenAI API pricing, checked nightly.
Prices below are checked nightly against OpenAI’s official pricing page and stored in an append-only history. A successful reproduction is verified. If a price cannot be reproduced, its last known value is carried forward and marked accordingly.
Current list prices
| Model | Input / 1M | Output / 1M | Context | The Hobbit* |
|---|---|---|---|---|
| GPT-6 Luna · Small TokenScale observation: verified 2026-10-06 | $0.1 | $0.5 | 1.05M | $0.0636 |
| GPT-5.6 Terra · Mid TokenScale observation: verified 2026-10-06 | $2.00 | $12.00 | 1M | $1.53 |
| GPT-6 Sol · Flagship TokenScale observation: verified 2026-10-06 | $2.00 | $10.00 | 1.05M | $1.27 |
Scroll the table sideways to see every column.
* Cost to generate The Hobbit (95,356 words ≈ 127,141 tokens) as output. Word count verified against Project Gutenberg.
All tracked OpenAI models
| Model | Input / 1M | Output / 1M | Context |
|---|---|---|---|
| GPT-6 Sol Tracked Flagship from 25 Sep 2026 · generally available since 22 Sep 2026 | $2.00 | $10.00 | 1.05M |
| GPT-6 Luna Tracked Small tier from 25 Sep 2026 · generally available since 22 Sep 2026 | $0.1 | $0.5 | 1.05M |
| GPT-6 Astra Highest-priced GPT-6 model, launched 3 Sep 2026 · not one of the three tracked tiers | $10.00 | $50.00 | 1.05M |
| GPT-5.6 Sol Previous flagship, still sold · tracked Flagship until 24 Sep 2026 | $5.00 | $30.00 | 1M |
| GPT-5.6 Terra Lower rate effective 30 Jul, verified by TokenScale 12 Aug | $2.00 | $12.00 | 1M |
| GPT-5.6 Luna Previous generation, still sold · tracked Small tier until 24 Sep 2026 | $0.2 | $1.20 | 1M |
| GPT-5.5 Previous flagship, still on the price list | $5.00 | $30.00 | 1M |
| GPT-5.4 Previous generation, still on the price list | $2.50 | $15.00 | 128K |
| GPT-5.4 mini Previous generation, cheapest OpenAI text model still sold | $0.75 | $4.50 | 128K |
| o3 Reasoning model, post May 2026 cut | $2.00 | $8.00 | 200K |
| o4 mini Fast reasoning, lower cost | $1.10 | $4.40 | 128K |
Scroll the table sideways to see every column.
Recent list-price changes
| Date | Tier | Was (in / out) | Now (in / out) |
|---|---|---|---|
| 2026-09-25 | GPT-6 Luna (tier) | $0.2 / $1.20 | $0.1 / $0.5 |
| 2026-09-25 | GPT-6 Sol (tier) | $5.00 / $30.00 | $2.00 / $10.00 |
| 2026-07-30 verified 2026-08-12 | historical slot before GPT-6 Luna (tier) | $1.00 / $6.00 | $0.2 / $1.20 |
| 2026-07-30 verified 2026-08-12 | GPT-5.6 Terra (tier) | $2.50 / $15.00 | $2.00 / $12.00 |
| 2026-07-28 | historical slot before GPT-6 Luna (tier) | $0.75 / $4.50 | $1.00 / $6.00 |
| 2026-05-15 | historical slot before GPT-6 Luna (tier) | $0.15 / $0.6 | $0.75 / $4.50 |
Scroll the table sideways to see every column.
Changes are recorded the night they appear on the official pricing page, unless corrected to an earlier confirmed effective date. A date shown with a quieter verified line beneath it is when this repricing actually took effect at the provider; TokenScale's nightly check confirmed it later, on the verified date. A historical slot is labelled neutrally when a later model replacement would otherwise rewrite the past. Full history: the charts.
About these numbers. The provider page is the authority for its current published price. TokenScale checks nightly against the official pricing page and keeps an independent append-only record of what was verified, changed, corrected or carried forward (data through 2026-10-06). Last hand-verified 2026-10-06. List prices only: promotions and limited-time discounts never enter the history. When a price cannot be reproduced, its last known value is retained and marked as carried; a later successful check verifies only its own date. If a number is wrong, the correction is published, not buried: see the methodology.
More pricing pages
- All tracked model pricing pages
- Model cost comparisons
- Public historical pricing dataset
- Claude API pricing
- Gemini API pricing
- The cheapest LLM APIs, ranked
- The state of AI pricing: the market, measured
- Price a real workload on the TokenScale calculator
- Night-by-night price history, one chart per provider
- The Chart: every model ranked, replayed at each price change