GPT-5.3 Instant
OpenAIProprietaryReasoningReleased Mar 3, 2026
Overall score
—
Not enough evidence to rank yet
Context window
400K
400,000 tokens
Price per 1M tokens
$1.75 in · $14.00 out
Source: BenchLM
Blended price
$4.81
3:1 input:output tokens
Output speed
—
Not measured yet
Benchmark results (0)
As reported in system cards, papers and public evaluations. Position compares this model with every other model reporting the same benchmark.
No benchmark results with redistributable sources yet.
Pricing by source
USD per 1M tokens.
| Source | Input | Output | Cached in |
|---|---|---|---|
| List price (BenchLM) | $1.75 | $14.00 | — |
OpenAI's GPT-5.3 Chat model page lists the GPT-5.3 Instant snapshot at $1.75 input / $14.00 output per million tokens.
Speed
Measured by us through OpenRouter (median of trials).
Not available on OpenRouter, so we cannot measure it yet.
Related models
Same family
- GPT-5.3 Codex60.5