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GPT-5.3 Instant

gpt-5.3-instant

Cheapest GPT-5.3 variant. 26.8% fewer hallucinations than GPT-5.2.

Context Window

400K

tokens

Max Output

128K

tokens

Input Price

$0.30

per 1M tokens

Output Price

$1.20

per 1M tokens

Details

Familygpt-5
Training Cutoff2025-10-01
ReleasedMarch 4, 2026

Capabilities

VisionFunctionsStreamingJSON ModeCodeReasoningTool UseMultimodal
Documentation
https://api.openai.com/v1/chat/completions

Evaluation Scores(3 benchmarks)

GPQA Diamond
92.4%
MMLU-Pro
90.1%

Quick Access

curl pikaainews.com/api/models/openai-gpt-5-3-instant
npx pika-models info openai-gpt-5-3-instant

Get API Access

Official

OpenAI

Official OpenAI API. Direct access to GPT, o-series, DALL-E.

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