ChatGPT-4o
by OpenAIChat
OpenAI ChatGPT 4o is continually updated by OpenAI to point to the current version of GPT-4o used by ChatGPT. It therefore differs slightly from the API version of GPT-4o in that it has additional RLHF. It is intended for research and evaluation.
- Context
- 128K tokens
- Max output
- 16,384 tokens
- Released
- 2024-08-14
- Weights
- Closed
openai/chatgpt-4o · also seen as openai/chatgpt-4o-latest, chatgpt-4o-latest
Specifications
Full facts as recorded, incl. what is unknown.
- Released
- 2024-08-14
- Weights
- Closed
- Input
- Text, Image
- Output
- Text
- Context window
- 128,000 max across endpoints
- Max output
- 16,384
- Providers
- 1 + 2 gateways, not counted as providers
- Epoch Capabilities Index
- not evaluated
- Direct price range
- $5.00 in · $15 out per 1M tokens · from its one provider
More details
- Last updated
- 2024-08-14
- Knowledge cutoff
- 2024-08
Capabilities
Across all endpoints: supported if any endpoint supports it.
- Tool calling
- Parallel toolsunknown
- Structured outputunknown
- Reasoning
- Image input
- PDF input
- Audio input
- Audio outputunknown
- Video input
- Prompt cachingunknown
- Web searchunknown
- Computer useunknown
- System messagesunknown
- Assistant prefillunknown
- Temperature
- Streamingunknown
- Attachments
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 $5.00 in / $15 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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Similarly priced models
Blended rate per 1M tokens, each at its own cheapest provider (10M input : 2M output mix).
| Model | Blended/1M | In/1M | Out/1M | Context | vs ChatGPT-4o |
|---|---|---|---|---|---|
| Claude Opus 4.5Anthropic | $7.50 | $4.50 | $22.50 | 200K | +0% |
| gpt-realtime-2OpenAI | $7.33 | $4.00 | $24 | 128K | −2% cheaper |
| GPT-Realtime-2.1OpenAI | $7.33 | $4.00 | $24 | 128K | −2% cheaper |
| Claude Opus LatestAnthropic | $6.67 | $4.00 | $20 | 1M | −11% cheaper |
| Claude Opus 5.5Anthropic | $6.67 | $4.00 | $20 | 1M | −11% cheaper |
| Muse WonderMeta | $6.67 | $4.00 | $20 | 1.05M | −11% cheaper |
| Muse WonderMeta | $6.67 | $4.00 | $20 | 1.05M | −11% cheaper |
| GPT-5.6 Sol ProOpenAI | $6.67 | $4.00 | $20 | 1.05M | −11% cheaper |
More from OpenAI
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| Model | Released | Context | Listed price |
|---|---|---|---|
| GPT-6.1 Sol Ultrafast | 2026-10-08 | 1.05M | from $12 |
| GPT-6 Luna Decisions | 2026-10-06 | 1.05M | unpriced |
| GPT-6.1 Sol | 2026-09-29 | 1.05M | from $2.00 |
| GPT-6.1 Sol Pro | 2026-09-29 | 1.05M | from $2.00 |
| GPT-6 Luna | 2026-09-22 | 1.05M | from $0.10 |
| GPT-6 Sol | 2026-09-22 | 1.05M | from $2.00 |
| GPT-6 Sol Pro | 2026-09-22 | 1.05M | from $2.00 |
| GPT-6 Luna Pro | 2026-09-22 | 1.05M | from $0.10 |