GPT-5.3
ActiveOpenAI GPT-5.3.
Updated 3 days agoStructured data from Modeldex catalog
Agentic
Not enough benchmark coverage yet for an Intelligence Index — needs at least 3 results across 2 categories.
History
GPT-5.3 is available from OpenAI.
Training & availability
OpenAI has not released the underlying model weights — access is via their hosted API only.
Capabilities
- Input modalities: text.
Recommended for: agentic.
Limitations
- Text-only — cannot process images, audio, or video inputs.
Quick start
Minimal example using the openai API. Copy, paste, replace the key.
from openai import OpenAI
client = OpenAI(api_key="sk-...")
resp = client.chat.completions.create(
model="gpt-5-3",
messages=[{"role": "user", "content": "Explain quantum computing in one sentence."}],
)
print(resp.choices[0].message.content)Cost calculator
Estimate your monthly bill. Presets are typical workload sizes.
5.0M
@ $1.75/1M
2.0M
@ $14/1M
Input cost
$8.75
5.0M × $1.75/1M
Output cost
$28
2.0M × $14/1M
Total / month
$36.75
$441 / year
Integrations & tooling support
- Tool calling
- Supported
- Structured outputs
- Supported
Price vs quality
Premium pricing
Priced like a frontier model. Quality tier pending more benchmark coverage.
- Quality percentile
- —
- Effective price
- $10.94/1M
- Pricing breakdown
- $1.75/1M in
$14/1M out
not enough benchmark coverage
/ 1M tokens (input + 3× output)
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Comments
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