What is the cheapest OpenAI model?

gpt-oss-20b is the lowest blended-price option among tracked active non-embedding models, or among all models if only embeddings are listed: $0.02 input and $0.09 output per million tokens ($0.04 blended). Blended pricing uses 75% input and 25% output for generation models; your cheapest option may differ with your workload.

Which OpenAI model has the highest AA Intelligence score?

GPT-6 Astra has the highest listed Artificial Analysis Intelligence Index score among tracked active OpenAI models: 52.7. This is one evaluation, not a guarantee of the best result for every task. Models without measured results are not ranked as zero.

How do I calculate monthly OpenAI API costs?

Multiply input tokens in millions by the input rate and add output tokens in millions multiplied by the output rate. For example, 20 million input and 5 million output tokens on gpt-oss-20b cost an estimated $0.81 at the listed rates. This excludes tool charges, cache-specific charges, taxes and any endpoint-specific adjustments.

Which OpenAI model has the largest context window?

GPT-5.4 has a listed context window of 1.1M tokens, the largest among tracked active OpenAI models. Context capacity and maximum response length are separate limits; verify both on the model page and in the endpoint documentation.

What is the latest OpenAI model in the catalog?

GPT-6.1 Sol has the most recent listed release date among tracked active OpenAI models: 2026-09-29. Models without a usable release date are excluded from this comparison. Catalog release dates do not guarantee immediate API availability.

Do OpenAI models support image inputs?

43 tracked active models list image inputs, including GPT-4 Turbo, GPT-4o (2024-05-13), GPT-4o (2024-08-06). Accepting images does not mean a model generates images; check each model's separate input and output formats and endpoint limits.

Can prompt caching lower OpenAI API costs?

42 tracked active models have a listed cached-input rate, including GPT-4o (2024-08-06), GPT-4o (2024-11-20), GPT-4o-mini (2024-07-18). Savings depend on eligible repeated input and the endpoint's cache rules, duration and any write charges.

Do OpenAI models support tool calling?

50 tracked active models list tool-calling capabilities, including GPT-3.5 Turbo, GPT-3.5 Turbo (older v0613), GPT-3.5 Turbo 16k. Verify the exact tool schema and availability with your API endpoint before integrating.

How should I compare OpenAI benchmark scores and prices?

Compare scores within the same evaluation: Artificial Analysis Intelligence Index, DesignArena Elo, general Arena Elo and MMLU-Pro use different tasks and scales. Missing results are not zeroes. Pair a relevant measured benchmark with input/output pricing and tests of your own workload; the cheapest or highest-scoring model is not automatically the best fit.

Are retired OpenAI models included in the price list?

The price list shows active models by default. Turn on Show retired models to include retired catalog entries, where available. A retained model page preserves reference information, not a promise that its API is still available.

Is OpenAI an AI lab or an inference host?

OpenAI is categorized as an AI lab in this catalog. Individual model pages list available API hosts separately; model creator and API host are different roles.

How does OpenAI bill for API usage?

OpenAI charges based on consumption measured in tokens for text and reasoning models, image counts for generation, or requests for specific audio and vector endpoints. Accounts typically use prepaid credit balances or invoiced enterprise billing.

Does OpenAI train its models on API customer data?

By default, OpenAI does not use data submitted to its API services to train or improve its models. Organizations can also establish enterprise agreements and custom data retention terms.

What is the difference between direct OpenAI APIs and Azure OpenAI Service?

Direct OpenAI APIs are managed via OpenAI platform accounts and billing. Azure OpenAI Service provides access to OpenAI models hosted within Microsoft Azure infrastructure, offering enterprise compliance and regional Azure billing.

Does OpenAI support function calling and structured outputs?

Yes, many OpenAI chat models support function calling and strict schema-constrained outputs. This allows developers to reliably parse JSON schemas and trigger programmatic functions.

What embedding models does OpenAI offer?

OpenAI offers dedicated embedding models such as text-embedding-3-small and text-embedding-3-large. These convert text into dense vector representations for similarity search and retrieval-augmented generation.

Can OpenAI models run locally or on-premises?

Most flagship OpenAI models are closed-source and hosted exclusively on managed cloud endpoints. Certain open-source weights published by OpenAI, such as whisper or specific open releases, can be run self-hosted.

AI lab

OpenAI API pricing & models

openai.com

Creator of GPT and o-series reasoning models. We track 54 OpenAI models, priced from $0.02 per 1M input tokens with context windows up to 1.1M tokens.

Models tracked

Text & Reasoning · Vision · Code & SLMs

$0.04

Cheapest model

gpt-oss-20b

Top quality score

GPT-5.2 Pro

1.1M

Largest context

6-mo price trend 1%

Overview

About OpenAI

OpenAI is an artificial intelligence research and deployment company that provides foundational generative AI models and developer APIs. Its platform powers a broad range of natural language processing, code generation, multimodal, and text embedding workloads across consumer applications and enterprise infrastructure.

Developers access OpenAI models primarily through HTTP APIs, official client libraries, and cloud partnerships. The catalog spans general-purpose conversational models, reasoning-focused engines, multimodal systems, and embeddings, supporting use cases from simple text parsing to autonomous agents.

OpenAI operates a usage-based consumption structure via its platform dashboard alongside dedicated enterprise agreements. In addition to direct API access, select models are also distributed through external cloud hosting partners such as Microsoft Azure.

Automated code generationCustomer support chatbotsSemantic text searchComplex workflow reasoningStructured data extraction

Strengths

Extensive model catalog covering chat, reasoning, code generation, vision, and vector embeddings.
Broad developer tooling ecosystem with widespread third-party library and framework integrations.
Robust API features including structured outputs, function calling, and batch processing.
Dual deployment options via direct OpenAI platform endpoints or Microsoft Azure OpenAI Service.

Limitations

Rate limits and token quotas vary by spending tier and can constrain rapid scaling for new accounts.
Proprietary models restrict direct access to model weights and local on-premises self-hosting.

Price list

All OpenAI models and prices

Current OpenAI API prices per 1M tokens, context windows and benchmark scores. Click a column to sort, or a model for full pricing details.

Show retired models


GPT-6 Astra OpenAI	$10	$50	1.1M	52.7	1384	1288	88.3	0%
GPT-6 Sol OpenAI	$2	$10	1.1M	47.6	1300	1266	84.6	0%
GPT-5.6 Sol OpenAI	$2	$10	1.1M	47	1320	1255	82.8	33%
GPT-5.6 Terra OpenAI	$2	$12	1.1M	42.1	1245	1233	79.1	0%
GPT-5.4 OpenAI	$2.5	$15	1.1M	39	—	—	—	0%
GPT-5.5 OpenAI	$5	$30	1.1M	38.4	1264	—	—	0%
GPT-6 Luna OpenAI	$0.1	$0.5	1.1M	38.1	1277	1211	75.4	0%
GPT-5.6 Luna OpenAI	$0.2	$1.2	1.1M	37.3	1235	1189	71.8	0%
GPT-5.3 Codex OpenAI	$1.75	$14	400K	32.5	1148	1244	81	0%
GPT-5.2 OpenAI	$1.75	$14	400K	30.4	—	1239	80	0%
GPT-5.2 Chat OpenAI	$1.75	$14	128K	30.4	—	—	—	0%
GPT-5.2-Codex OpenAI	$1.75	$14	400K	28.5	—	—	—	0%
GPT-5.1 OpenAI	$1.25	$10	400K	24.7	—	1228	78.2	0%
GPT-5.4 mini OpenAI	$0.75	$4.5	400K	24.1	—	1200	73.6	0%
GPT-5.1-Codex OpenAI	$1.25	$10	400K	23.7	1156	—	—	0%
GPT-5.4 nano OpenAI	$0.2	$1.25	400K	20.7	—	1156	66.2	0%
GPT-5.1-Codex-Mini OpenAI	$0.25	$2	400K	20.4	1098	—	—	0%
GPT-4.1 OpenAI	$2	$8	1M	12.7	1029	1200	73.6	-9%
gpt-oss-120b OpenAI	$0.15	$0.6	131K	11.6	967	—	—	0%
o3 Mini High OpenAI	$1.1	$4.4	200K	11	—	—	—	0%
GPT-4.1 mini OpenAI	$0.4	$1.6	1M	10.2	997	1167	68.1	0%
gpt-oss-20b OpenAI	$0.018	$0.09	131K	9	—	—	—	0%
GPT-4o OpenAI	$2.5	$10	128K	8.4	864	1178	69.9	-26%
GPT-4o (2024-08-06)OpenAI	$2.5	$10	128K	7.7	—	—	—	0%
GPT-4o (2024-05-13)OpenAI	$5	$15	128K	7.3	—	—	—	0%
GPT-4 Turbo OpenAI	$10	$30	128K	7	—	—	—	0%
GPT-4 OpenAI	$30	$60	8K	6.7	—	—	—	0%
GPT-4o mini OpenAI	$0.15	$0.6	128K	6.7	—	1123	60.7	-17%
GPT Audio OpenAI	$2.5	$10	128K	—	—	—	—	0%
GPT Audio Mini OpenAI	$0.6	$2.4	128K	—	—	—	—	0%
GPT Chat Latest OpenAI	$5	$30	400K	—	—	—	—	0%
GPT-3.5 Turbo OpenAI	$0.5	$1.5	16K	—	—	—	—	0%
GPT-3.5 Turbo (older v0613)OpenAI	$1	$2	4K	—	—	—	—	0%
GPT-3.5 Turbo 16k OpenAI	$3	$4	16K	—	—	—	—	0%
GPT-3.5 Turbo Instruct OpenAI	$1.5	$2	4K	—	—	—	—	0%
GPT-4o (2024-11-20)OpenAI	$2.5	$10	128K	—	—	—	—	0%
GPT-4o-mini (2024-07-18)OpenAI	$0.15	$0.6	128K	—	—	—	—	0%
GPT-5 Image OpenAI	$10	$10	400K	—	—	—	—	0%
GPT-5 Image Mini OpenAI	$2.5	$2	400K	—	—	—	—	0%
GPT-5.1-Codex-Max OpenAI	$1.25	$10	400K	—	—	—	—	0%
GPT-5.2 Pro OpenAI	$21	$168	400K	—	—	1255	82.8	0%
GPT-5.4 Image 2 OpenAI	$8	$15	272K	—	—	—	—	0%
GPT-5.4 Pro OpenAI	$30	$180	1.1M	—	—	—	—	0%
GPT-5.5 Pro OpenAI	$30	$180	1.1M	—	—	—	—	0%
GPT-5.6 Luna Pro OpenAI	$0.2	$1.2	1.1M	—	—	—	—	0%
GPT-5.6 Sol Pro OpenAI	$2	$10	1.1M	—	—	—	—	167%
GPT-5.6 Terra Pro OpenAI	$2	$12	1.1M	—	—	—	—	0%
GPT-6 Astra Pro OpenAI	$10	$50	1.1M	—	—	—	—	0%
GPT-6 Luna Pro OpenAI	$0.1	$0.5	1.1M	—	—	—	—	0%
GPT-6 Sol Pro OpenAI	$2	$10	1.1M	—	—	—	—	0%
GPT-6.1 Sol OpenAI	$2	$10	1.1M	—	—	—	—	0%
GPT-6.1 Sol Pro OpenAI	$2	$10	1.1M	—	—	—	—	0%
gpt-oss-safeguard-20b OpenAI	$0.075	$0.3	131K	—	—	—	—	0%
o4 Mini High OpenAI	$1.1	$4.4	200K	—	—	—	—	0%

GPT-6 Astra OpenAI

Input /1M: $10
Output /1M: $50
Context: 1.1M
AA Intelligence: 52.7
DesignArena Elo: 1384
Arena Elo: 1288
MMLU-Pro: 88.3
30d trend: 0%

GPT-6 Sol OpenAI

Input /1M: $2
Output /1M: $10
Context: 1.1M
AA Intelligence: 47.6
DesignArena Elo: 1300
Arena Elo: 1266
MMLU-Pro: 84.6
30d trend: 0%

GPT-5.6 Sol OpenAI

Input /1M: $2
Output /1M: $10
Context: 1.1M
AA Intelligence: 47
DesignArena Elo: 1320
Arena Elo: 1255
MMLU-Pro: 82.8
30d trend: 33%

GPT-5.6 Terra OpenAI

Input /1M: $2
Output /1M: $12
Context: 1.1M
AA Intelligence: 42.1
DesignArena Elo: 1245
Arena Elo: 1233
MMLU-Pro: 79.1
30d trend: 0%

GPT-5.4 OpenAI

Input /1M: $2.5
Output /1M: $15
Context: 1.1M
AA Intelligence: 39
DesignArena Elo: —
Arena Elo: —
MMLU-Pro: —
30d trend: 0%

GPT-5.5 OpenAI

Input /1M: $5
Output /1M: $30
Context: 1.1M
AA Intelligence: 38.4
DesignArena Elo: 1264
Arena Elo: —
MMLU-Pro: —
30d trend: 0%

GPT-6 Luna OpenAI

Input /1M: $0.1
Output /1M: $0.5
Context: 1.1M
AA Intelligence: 38.1
DesignArena Elo: 1277
Arena Elo: 1211
MMLU-Pro: 75.4
30d trend: 0%

GPT-5.6 Luna OpenAI

Input /1M: $0.2
Output /1M: $1.2
Context: 1.1M
AA Intelligence: 37.3
DesignArena Elo: 1235
Arena Elo: 1189
MMLU-Pro: 71.8
30d trend: 0%

GPT-5.3 Codex OpenAI

Input /1M: $1.75
Output /1M: $14
Context: 400K
AA Intelligence: 32.5
DesignArena Elo: 1148
Arena Elo: 1244
MMLU-Pro: 81
30d trend: 0%

GPT-5.2 OpenAI

Input /1M: $1.75
Output /1M: $14
Context: 400K
AA Intelligence: 30.4
DesignArena Elo: —
Arena Elo: 1239
MMLU-Pro: 80
30d trend: 0%

GPT-5.2 Chat OpenAI

Input /1M: $1.75
Output /1M: $14
Context: 128K
AA Intelligence: 30.4
DesignArena Elo: —
Arena Elo: —
MMLU-Pro: —
30d trend: 0%

GPT-5.2-Codex OpenAI

Input /1M: $1.75
Output /1M: $14
Context: 400K
AA Intelligence: 28.5
DesignArena Elo: —
Arena Elo: —
MMLU-Pro: —
30d trend: 0%

GPT-5.1 OpenAI

Input /1M: $1.25
Output /1M: $10
Context: 400K
AA Intelligence: 24.7
DesignArena Elo: —
Arena Elo: 1228
MMLU-Pro: 78.2
30d trend: 0%

GPT-5.4 mini OpenAI

Input /1M: $0.75
Output /1M: $4.5
Context: 400K
AA Intelligence: 24.1
DesignArena Elo: —
Arena Elo: 1200
MMLU-Pro: 73.6
30d trend: 0%

GPT-5.1-Codex OpenAI

Input /1M: $1.25
Output /1M: $10
Context: 400K
AA Intelligence: 23.7
DesignArena Elo: 1156
Arena Elo: —
MMLU-Pro: —
30d trend: 0%

Showing 15 of 54

15 of 54 models

OpenAI input vs output prices

USD per 1M tokens for each model.

15 of 54 models

GPT-6 Astra: $10 input, $50 output per million tokens.
GPT-6 Sol: $2 input, $10 output per million tokens.
GPT-5.6 Sol: $2 input, $10 output per million tokens.
GPT-5.6 Terra: $2 input, $12 output per million tokens.
GPT-5.4: $2.5 input, $15 output per million tokens.
GPT-5.5: $5 input, $30 output per million tokens.
GPT-6 Luna: $0.1 input, $0.5 output per million tokens.
GPT-5.6 Luna: $0.2 input, $1.2 output per million tokens.
GPT-5.3 Codex: $1.75 input, $14 output per million tokens.
GPT-5.2: $1.75 input, $14 output per million tokens.
GPT-5.2 Chat: $1.75 input, $14 output per million tokens.
GPT-5.2-Codex: $1.75 input, $14 output per million tokens.
GPT-5.1: $1.25 input, $10 output per million tokens.
GPT-5.4 mini: $0.75 input, $4.5 output per million tokens.
GPT-5.1-Codex: $1.25 input, $10 output per million tokens.
GPT-5.4 nano: $0.2 input, $1.25 output per million tokens.
GPT-5.1-Codex-Mini: $0.25 input, $2 output per million tokens.
GPT-4.1: $2 input, $8 output per million tokens.
gpt-oss-120b: $0.15 input, $0.6 output per million tokens.
o3 Mini High: $1.1 input, $4.4 output per million tokens.
GPT-4.1 mini: $0.4 input, $1.6 output per million tokens.
gpt-oss-20b: $0.018 input, $0.09 output per million tokens.
GPT-4o: $2.5 input, $10 output per million tokens.
GPT-4o (2024-08-06): $2.5 input, $10 output per million tokens.
GPT-4o (2024-05-13): $5 input, $15 output per million tokens.
GPT-4 Turbo: $10 input, $30 output per million tokens.
GPT-4: $30 input, $60 output per million tokens.
GPT-4o mini: $0.15 input, $0.6 output per million tokens.
GPT Audio: $2.5 input, $10 output per million tokens.
GPT Audio Mini: $0.6 input, $2.4 output per million tokens.
GPT Chat Latest: $5 input, $30 output per million tokens.
GPT-3.5 Turbo: $0.5 input, $1.5 output per million tokens.
GPT-3.5 Turbo (older v0613): $1 input, $2 output per million tokens.
GPT-3.5 Turbo 16k: $3 input, $4 output per million tokens.
GPT-3.5 Turbo Instruct: $1.5 input, $2 output per million tokens.
GPT-4o (2024-11-20): $2.5 input, $10 output per million tokens.
GPT-4o-mini (2024-07-18): $0.15 input, $0.6 output per million tokens.
GPT-5 Image: $10 input, $10 output per million tokens.
GPT-5 Image Mini: $2.5 input, $2 output per million tokens.
GPT-5.1-Codex-Max: $1.25 input, $10 output per million tokens.
GPT-5.2 Pro: $21 input, $168 output per million tokens.
GPT-5.4 Image 2: $8 input, $15 output per million tokens.
GPT-5.4 Pro: $30 input, $180 output per million tokens.
GPT-5.5 Pro: $30 input, $180 output per million tokens.
GPT-5.6 Luna Pro: $0.2 input, $1.2 output per million tokens.
GPT-5.6 Sol Pro: $2 input, $10 output per million tokens.
GPT-5.6 Terra Pro: $2 input, $12 output per million tokens.
GPT-6 Astra Pro: $10 input, $50 output per million tokens.
GPT-6 Luna Pro: $0.1 input, $0.5 output per million tokens.
GPT-6 Sol Pro: $2 input, $10 output per million tokens.
GPT-6.1 Sol: $2 input, $10 output per million tokens.
GPT-6.1 Sol Pro: $2 input, $10 output per million tokens.
gpt-oss-safeguard-20b: $0.075 input, $0.3 output per million tokens.
o4 Mini High: $1.1 input, $4.4 output per million tokens.

OpenAI price history

Blended price per 1M tokens over the last 6 months.

By use case

OpenAI models by category

Text & Reasoning

54 models · cheapest

gpt-oss-20b

$0.04 blended / 1M

Vision

42 models · cheapest

GPT-6 Luna Pro

$0.20 blended / 1M

Code & SLMs

17 models · cheapest

GPT-6 Luna

$0.20 blended / 1M

Comparisons

OpenAI vs other AI providers

Compare GPT-5.2 Pro with models from other AI providers, including pricing and benchmark results.

OpenAI vs Google

GPT-5.2 Pro vs Nano Banana Pro (Gemini 3 Pro Image)

$58 vs $4.50 · Arena Elo 1255 vs 1211

OpenAI vs Anthropic

GPT-5.2 Pro vs Claude Opus 5.5

$58 vs $8.00 · Arena Elo 1255 vs —

OpenAI vs xAI

GPT-5.2 Pro vs Grok 4.7

$58 vs $3.00 · Arena Elo 1255 vs —

OpenAI vs Meta

GPT-5.2 Pro vs Muse Spark 1.3

$58 vs $2.00 · Arena Elo 1255 vs —

OpenAI vs DeepSeek

GPT-5.2 Pro vs DeepSeek V4.1 Flash

$58 vs $0.34 · Arena Elo 1255 vs —

OpenAI vs Mistral AI

GPT-5.2 Pro vs Mistral Medium 3.5

$58 vs $3.00 · Arena Elo 1255 vs —

Model Architecture and API Capabilities

OpenAI provides developer access through standardized REST APIs supporting chat completions, assistants, embeddings, and batch processing. The model lineup includes flagship multimodal series like GPT-4o, cost-effective mini variants, specialized reasoning models, and code-focused checkpoints. Features like JSON schema enforcement and tool calling simplify integrating models into backend workflows.

Beyond raw text generation, OpenAI supports multimodal workflows including visual input interpretation and image generation. High-throughput and asynchronous workflows can leverage endpoints like the Batch API to process non-urgent workloads at reduced rates.

Enterprise Integration and Security

For enterprise deployments, OpenAI provides organization-level controls, project-based API keys, administrative auditing, and single sign-on. Security frameworks adhere to SOC 2 compliance standards, and commercial API contracts explicitly exclude customer prompt inputs and completions from model retraining datasets.

Organizations with strict regulatory mandates can choose between OpenAI platform endpoints and Microsoft Azure OpenAI Service. Azure deployments integrate directly with Azure Virtual Networks, private endpoints, and enterprise data governance frameworks.

FAQ

OpenAI pricing FAQ

Tracked active OpenAI models range from $0.02 to $30 per million input tokens. Output rates are listed separately for each model. Prices vary by model and API endpoint; these are token rates, not a subscription quote.