Model Tracker
GPT-5.3
GPT-5.3 is an AI model made by OpenAI. OpenAI released it on 3 March 2026. OpenAI retired it on 10 August 2026. It takes text, image and returns text.
GPT-5.3 is an AI model made by OpenAI. OpenAI released it on 3 March 2026. OpenAI retired it on 10 August 2026. It takes text, image and returns text. Its context window is 128,000 tokens. Its longest answer is 16,384 tokens. Through the API it costs $1.75 per 1M tokens for input and $14.00 per 1M tokens for output. Its knowledge cutoff is 31 August 2025.
- Released
- 3 March 2026 — openai.com, read 16 October 2026
- Status
- Not confirmed: its line was not found on its page, and a second reading did not confirm it
- Takes
- Text, Image — developers.openai.com, read 16 October 2026
- Returns
- Text — developers.openai.com, read 16 October 2026
- Open weights
- Not confirmed: The maker's model page, announcement, and system card do not state whether this model's weights are open or downloadable.
- Licence
- Not confirmed: The maker's pages reviewed do not name a model-weights licence.
- Context window
- 128,000 tokens — developers.openai.com, read 16 October 2026
- Longest answer
- 16,384 tokens — developers.openai.com, read 16 October 2026
- Knowledge cutoff
- 31 August 2025 — developers.openai.com, read 16 October 2026
- API price, input
- $1.75 per 1M tokens — developers.openai.com, read 16 October 2026
- API price, output
- $14.00 per 1M tokens — developers.openai.com, read 16 October 2026
- Where
- Not confirmed: The maker confirms API and ChatGPT availability at launch, but the API model shut down on August 10, 2026, and the reviewed pages do not confirm whether this specific model remains available in the ChatGPT app today.
- Parameters
- Not confirmed: The maker's reviewed pages do not publish a parameter count for this model.
- Model card
- https://deploymentsafety.openai.com/gpt-5-3-instant/gpt-5-3-instant.pdf — deploymentsafety.openai.com, read 16 October 2026
Questions
When was GPT-5.3 released?
OpenAI released GPT-5.3 on 3 March 2026.
What is the context window of GPT-5.3?
The context window of GPT-5.3 is 128,000 tokens, as OpenAI prints it.
How much does the GPT-5.3 API cost?
On the standard tier, GPT-5.3 costs $1.75 per 1M tokens for input and $14.00 per 1M tokens for output, as OpenAI lists it.
What does GPT-5.3 take and return?
GPT-5.3 takes text, image and returns text.
What is the knowledge cutoff of GPT-5.3?
The knowledge cutoff of GPT-5.3 is 31 August 2025.
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Sources
- GPT-5.3 Chat Model (read 16 October 2026)
- GPT-5.3 Instant: Smoother, more useful everyday conversations (read 16 October 2026)
- Deprecations (read 16 October 2026)
- GPT-5.3 Instant System Card (read 16 October 2026)