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GPT-5.3-Instant

Compact GPT model for low-latency assistance and high-volume workloads

Best input price

$1.60

per million tokens

Context window
128,000

tokens

Reasoning
No
Tool calling
Supported
Released
2026-03-03

Inference providers1 hosting GPT-5.3-Instant

  • Poe

    openai/gpt-5.3-instant

    128,000 context$13.00 out / 1M
    $1.60

    in / 1M