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Vikshy Models · OpenAI

OpenAI models: pricing, context & what each is for

OpenAI has 14 models in the Vikshy catalogue, spanning GPT-5.6, GPT-5.5, GPT-5.4, o-series and more, compared side by side on context window, API pricing, modality, and what each is best for, every model linked to OpenAI's official docs and pricing. Prices are per million tokens and can change, so the linked pricing page is the source of truth. For how OpenAI ranks against other labs, see its Vikshy Score. Updated 2026-07-21.

ModelContextInput /MOutput /MModalityAccess
GPT-5.6 SolFrontier
Teams tackling the hardest agentic and coding work.
1M
$5.00
$30.00
Multimodal
API + ChatGPT
DocsPrice
GPT-5.5Flagship
Broad production use across chat and tools.
1M
$5.00
$30.00
Multimodal
API + ChatGPT
DocsPrice
GPT-5.5 ProReasoning
Research-grade analysis where accuracy beats cost.
1M
$30.00
$180.00
Multimodal
API + ChatGPT
DocsPrice
o3Reasoning
Math, logic, and analysis that need deeper thinking.
200K
$2.00
$8.00
Multimodal
API + ChatGPT
DocsPrice
GPT-5.6 TerraBalanced
Everyday production apps that need strong quality on a budget.
1M
$2.50
$15.00
Multimodal
API + ChatGPT
DocsPrice
GPT-Realtime-2Balanced
Voice agents and live conversation. Prices are per 1M audio tokens.
32K
$32.00
$64.00
Audio
API
DocsPrice
GPT-image-2Balanced
Product imagery, design, and creative work. Text in, image tokens out.
N/A
$5.00
$30.00
Image
API
DocsPrice
GPT-5.6 LunaEfficient
Chat, classification, and other high-throughput jobs.
1M
$1.00
$6.00
Multimodal
API + ChatGPT
DocsPrice
GPT-5.4 miniEfficient
Lightweight tasks and cost-sensitive apps.
1M
$0.75
$4.50
Multimodal
API + ChatGPT
DocsPrice
GPT-5.4 nanoEfficient
Classification, extraction, and routing at scale.
1M
$0.20
$1.25
Multimodal
API
DocsPrice
gpt-oss-120bOpen
Teams that want to self-host a capable model.
128K
Open
Open
Text
Open weights
DocsPrice
gpt-oss-20bOpen
On-device and low-footprint deployments.
128K
Open
Open
Text
Open weights
DocsPrice
GPT-5Legacy
Apps not yet moved to the 5.5 or 5.6 line.
400K
$1.25
$10.00
Multimodal
API + ChatGPT
DocsPrice
GPT-4.1Legacy
Legacy integrations still built on GPT-4.
1M
$2.00
$8.00
Multimodal
API + ChatGPT
DocsPrice
OpenAI's Vikshy Score →All models, compared →What is the Vikshy Score? →

OpenAI models, common questions

What is OpenAI's most capable model?

Its highest-tier model in the catalogue is GPT-5.6 Sol (Frontier tier), built for teams tackling the hardest agentic and coding work.

Which OpenAI model is cheapest?

By API input price, GPT-5.4 nano is the lowest at $0.20 per million input tokens ($1.25 output).

What is the largest context window OpenAI offers?

GPT-5.6 Sol has the largest listed context window, up to 1M tokens.

Does OpenAI offer open-weight models?

Yes. 2 of OpenAI's catalogued models are available as open weights.