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GPT-5.3 Codex Spark

Cost: $0

Knowledge cutoff: 2025-08-31 · Context window: 128,000 tokens · Reasoning model

Input Price

$1.75 / 1M tokens

Output Price

$14 / 1M tokens

Context Window

128,000 tokens

Hey! I'm here and ready to chat about whatever you'd like.

Cost: $0

Knowledge cutoff: 2025-08-31 · Context window: 400,000 tokens · Reasoning model

Input Price

$0.75 / 1M tokens

Output Price

$4.5 / 1M tokens

Context Window

400,000 tokens

Hey! I'm here and ready to chat about whatever you'd like.