OpenAI API pricing
Current OpenAI API prices per million tokens, context windows and independent benchmark scores for GPT models, including GPT-6 Astra and GPT-6.1 Terra.
Prices updated . Benchmarks updated .
Prices are the current OpenRouter rate, refreshed about hourly. This page does not chart older prices.
| Model | You send / 1M | It replies / 1M | Context | ECI | Launched |
|---|---|---|---|---|---|
| GPT-6 AstraClosed | $10.00 | $50.00 | 1.05M | 169.1 | 2026-09-04 |
| GPT-6.1 TerraClosed | $1.00 | $5.00 | 1.05M | 168.1 | 2026-10-26 |
| GPT-6.1 SolClosed | $2.00 | $10.00 | 1.05M | 167.8 | 2026-09-29 |
| GPT-6 SolClosed | $2.00 | $10.00 | 1.05M | 163.8 | 2026-09-22 |
| GPT-5.5 ProClosed | $30.00 | $180 | 1.05M | 163.1 | 2026-04-23 |
| GPT-5.6 SolClosed | $4.00 | $20.00 | 1.05M | 162.6 | 2026-07-09 |
| GPT-5.6 TerraClosed | $2.00 | $12.00 | 1.05M | 160.1 | 2026-07-09 |
| GPT-5.4 ProClosed | $30.00 | $180 | 1.05M | 159.8 | 2026-03-05 |
| GPT-5.5Closed | $5.00 | $30.00 | 1.05M | 159.4 | 2026-04-24 |
| GPT-5.4Closed | $2.50 | $15.00 | 1.05M | 157.1 | 2026-03-05 |
| GPT-6 LunaClosed | $0.100 | $0.500 | 1.05M | 156.8 | 2026-09-22 |
| GPT-5.6 LunaClosed | $0.200 | $1.20 | 1.05M | 156.7 | 2026-07-09 |
| GPT-5.2 ProClosed | $21.00 | $168 | 400K | 156.5 | 2025-12-11 |
| GPT-5.2Closed | $1.75 | $14.00 | 400K | 153.8 | 2025-12-11 |
| GPT-5 ProClosed | $15.00 | $120 | 400K | 150.7 | 2025-10-06 |
| GPT-5Closed | $1.25 | $10.00 | 400K | 150.0 | 2025-08-07 |
| GPT-5.1Closed | $1.25 | $10.00 | 400K | 149.9 | 2025-11-14 |
| GPT-5.4 MiniClosed | $0.750 | $4.50 | 400K | 148.8 | 2026-03-17 |
| o3 ProClosed | $20.00 | $80.00 | 200K | 147.4 | 2025-06-10 |
| o3Closed | $2.00 | $8.00 | 200K | 146.9 | 2025-04-16 |
| GPT-5.4 NanoClosed | $0.200 | $1.25 | 400K | 146.1 | 2026-03-17 |
| GPT-5 MiniClosed | $0.250 | $2.00 | 400K | 145.4 | 2025-08-07 |
| gpt-oss-120bOpen weights | $0.150 | $0.600 | 131K | 139.8 | 2025-08-05 |
| GPT-5 NanoClosed | $0.050 | $0.400 | 400K | 139.3 | 2025-08-07 |
| gpt-oss-20bOpen weights | $0.018 | $0.090 | 131K | 137.8 | 2025-08-05 |
| GPT-4.1Closed | $2.00 | $8.00 | 1.05M | 136.7 | 2025-04-14 |
| GPT-4.1 MiniClosed | $0.400 | $1.60 | 1.05M | 134.9 | 2025-04-14 |
| GPT-4.1 NanoClosed | $0.100 | $0.400 | 1.05M | 129.6 | 2025-04-14 |
| GPT-4o-miniClosed | $0.150 | $0.600 | 128K | 126.5 | 2024-07-18 |
| GPT-6.1 Terra ProClosed | $1.00 | $5.00 | 1.05M | n/a | 2026-10-27 |
| GPT-6.1 Sol ProClosed | $2.00 | $10.00 | 1.05M | n/a | 2026-09-29 |
| GPT-6 Luna ProClosed | $0.100 | $0.500 | 1.05M | n/a | 2026-09-22 |
| GPT-6 Sol ProClosed | $2.00 | $10.00 | 1.05M | n/a | 2026-09-22 |
| GPT-6 Astra ProClosed | $10.00 | $50.00 | 1.05M | n/a | 2026-09-04 |
| GPT-5.6 Luna ProClosed | $0.200 | $1.20 | 1.05M | n/a | 2026-07-09 |
| GPT-5.6 Terra ProClosed | $2.00 | $12.00 | 1.05M | n/a | 2026-07-09 |
| GPT-5.6 Sol ProClosed | $4.00 | $20.00 | 1.05M | n/a | 2026-07-09 |
| GPT Chat LatestClosed | $5.00 | $30.00 | 400K | n/a | 2026-05-05 |
| GPT-5.4 Image 2Closed | $8.00 | $15.00 | 272K | n/a | 2026-04-21 |
| GPT-5.3-CodexClosed | $1.75 | $14.00 | 400K | n/a | 2026-02-24 |
| GPT-5.2-CodexClosed | $1.75 | $14.00 | 400K | n/a | 2026-01-14 |
| GPT-5.2 ChatClosed | $1.75 | $14.00 | 128K | n/a | 2025-12-11 |
| GPT-5.1-CodexClosed | $1.25 | $10.00 | 400K | n/a | 2025-11-14 |
| GPT-5.1-Codex-MiniClosed | $0.250 | $2.00 | 400K | n/a | 2025-11-14 |
| GPT-5.1-Codex-MaxClosed | $1.25 | $10.00 | 400K | n/a | 2025-11-13 |
| gpt-oss-safeguard-20bOpen weights | $0.075 | $0.300 | 128K | n/a | 2025-10-29 |
| GPT-5 Image MiniClosed | $2.50 | $2.00 | 400K | n/a | 2025-10-16 |
| GPT-5 ImageClosed | $10.00 | $10.00 | 400K | n/a | 2025-10-14 |
| GPT Audio MiniClosed | $0.600 | $2.40 | 128K | n/a | 2025-10-06 |
| GPT AudioClosed | $2.50 | $10.00 | 128K | n/a | 2025-08-28 |
| GPT-4o (2024-11-20)Closed | $2.50 | $10.00 | 128K | n/a | 2024-11-20 |
| GPT-4o (2024-08-06)Closed | $2.50 | $10.00 | 128K | n/a | 2024-08-06 |
| GPT-4o-mini (2024-07-18)Closed | $0.150 | $0.600 | 128K | n/a | 2024-07-18 |
| GPT-4oClosed | $2.50 | $10.00 | 128K | n/a | 2024-05-13 |
| GPT-4o (2024-05-13)Closed | $5.00 | $15.00 | 128K | n/a | 2024-05-13 |
| GPT-3.5 Turbo (older v0613)Closed | $1.00 | $2.00 | 4K | n/a | 2024-01-25 |
| GPT-4Closed | $30.00 | $60.00 | 8K | n/a | 2023-11-06 |
| GPT-3.5 Turbo 16kClosed | $3.00 | $4.00 | 16K | n/a | 2023-08-28 |
Which OpenAI model ranks highest?
GPT-6 Astra has the highest Epoch Capabilities Index among OpenAI models on this page, at 169.1. GPT-6.1 Terra is next at 168.1. GPT-6 Astra costs $50.00 per million output tokens and reads 1.05M of context. The index is an independent score from Epoch AI. Lab-reported numbers are kept off this ranking.
Which OpenAI model is cheapest?
gpt-oss-20b has the lowest published output price among OpenAI models here, at $0.090 per million tokens. Input tokens cost $0.018 per million and the context window is 131K. gpt-oss-safeguard-20b is next at $0.300 per million output tokens. Its Epoch Capabilities Index is 137.8. Prices are the current public rate and can change.
Which OpenAI open-weight models lead?
gpt-oss-120b leads OpenAI open-weight models that have a published Epoch Capabilities Index, at 139.8. It is from OpenAI, costs $0.600 per million output tokens, and reads 131K. gpt-oss-20b from OpenAI follows at 137.8. Open weights means the lab published the weights. The license on the model page says what you can do with them.
FAQ
Which OpenAI model ranks highest?
GPT-6 Astra has the highest Epoch Capabilities Index among OpenAI models on this page, at 169.1. GPT-6.1 Terra is next at 168.1. GPT-6 Astra costs $50.00 per million output tokens and reads 1.05M of context. The index is an independent score from Epoch AI. Lab-reported numbers are kept off this ranking.
Which OpenAI model is cheapest?
gpt-oss-20b has the lowest published output price among OpenAI models here, at $0.090 per million tokens. Input tokens cost $0.018 per million and the context window is 131K. gpt-oss-safeguard-20b is next at $0.300 per million output tokens. Its Epoch Capabilities Index is 137.8. Prices are the current public rate and can change.
How many OpenAI models are listed?
This page lists 58 OpenAI models with a public price or an independent score. Open the comparison table to filter the full catalogue.
Sources and licenses
- OpenRouter: Prices, context windows, modalities and the model list come from the OpenRouter public API. Data: OpenRouter.
- Vercel AI Gateway: The no-training flag comes from the Vercel AI Gateway model list.
- models.dev: Lab launch dates, open-weights flags and knowledge cutoffs come from models.dev. Copyright (c) 2025 models.dev, MIT License.
- Epoch AI: Independent benchmark scores and the Epoch Capabilities Index (ECI) come from Epoch AI's Benchmarking Hub, used under CC BY 4.0. Epoch AI, Capabilities & benchmarking, epoch.ai/benchmarks. Scores Epoch marks as external keep their original license, and the source is named on each score.
- LMArena: Arena Elo (text, webdev and vision) comes from the LMArena leaderboard dataset (lmarena-ai/leaderboard-dataset), CC BY 4.0, leaderboard date 2026-10-28.
- Lab-reported scores, when an editor has added them, are the lab's own numbers. Each one links to the source and is labeled lab-reported. They are not used to rank the lists.
- What a score measures: the benchmark guide.