GPT-5.3 Chat
by OpenAI · openai/gpt-5.3-chat · #282 cheapest of 325 paid models
Prices updated Jul 22, 2026, 2:02 AM UTC · refreshed hourly
GPT-5.3 Chat is an update to ChatGPT's most-used model that makes everyday conversations smoother, more useful, and more directly helpful. It delivers more accurate answers with better contextualization and significantly...
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Pricing
Input
$1.75
per 1M tokens
Output
$14.00
per 1M tokens
Blended (3:1)
$4.81
3 input : 1 output
Cache read
$0.175
per 1M cached tokens
Cache write
—
per 1M tokens
Cache & batch economics
Effective prices for GPT-5.3 Chat with prompt caching.
| Cache hit rate | Effective blended $/1M | Example request* | vs no cache |
|---|---|---|---|
| 0% | $4.81 | $0.1925 | — |
| 50% | $4.22 | $0.1138 | −41% |
| 90% | $3.75 | $0.0508 | −74% |
*Example: 100K sticky context + 2K new input + 1K output. Batch discount is an approximate 50% off list rates for this provider’s batch API. Confirm on the vendor’s pricing page.
What a request costs
| Workload | Input tokens | Output tokens | Cost / request | Cost / 1K requests |
|---|---|---|---|---|
| Short chat message | 500 | 300 | $0.005075 | $5.07 |
| Document summary | 8,000 | 1,000 | $0.028 | $28.00 |
| Codebase question (RAG) | 30,000 | 2,000 | $0.0805 | $80.50 |
| Long-context analysis | 150,000 | 5,000 | $0.3325 | $332.50 |
Specs
Context window
128K
tokens
Max output
16K
tokens
Input modalities
text, image, file
Tokenizer
GPT