GPT-4.5
by OpenAIChat
GPT-4.5 (Preview) is a research preview of OpenAI's latest language model, designed to advance capabilities in reasoning, creativity, and multi-turn conversation. It builds on previous iterations with improvements in world knowledge, contextual coherence, and the ability to follow user intent more effectively.
- Context
- 128K tokens
- Max output
- 16,384 tokens
- Weights
- unknown
openai/gpt-4-5-preview
Specifications
Full facts as recorded, incl. what is unknown.
- Released
- —
- Weights
- unknown
- Input
- Text
- Output
- Text
- Context window
- 128,000 max across endpoints
- Max output
- 16,384
- Providers
- 2
- Epoch Capabilities Index
- not evaluated
- Direct price range
- $75 in · $150 out per 1M tokens · 1 of 2 providers have a comparable price
More details
- Last updated
- —
- Knowledge cutoff
Capabilities
Across all endpoints: supported if any endpoint supports it.
- Tool calling
- Parallel tools
- Structured output
- Reasoningunknown
- Image input
- PDF inputunknown
- Audio inputunknown
- Audio outputunknown
- Video inputunknown
- Prompt caching
- Web searchunknown
- Computer useunknown
- System messages
- Assistant prefillunknown
- Temperatureunknown
- Streamingunknown
- Attachmentsunknown
Endpoints
One row per provider and variant; gateways are listed separately.
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Price history
Atom feedNo change since 19 Oct 2026. The cheapest direct price has been $75 in / $150 out per 1M tokens at OpenAI on every data refresh since then.
Tracked from 19 Oct 2026. Headline-eligible direct prices only, so a price the sanity check flags never draws a spike. Series as JSON
Cost calculator
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