AI Index

GPT-5.3 Chat

Language OpenAI Verified Retired Shut down Aug 10, 2026 Released Mar 3, 2026
Model ID
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Context
128K
16K max output
Input price
—
Not listed
Output price
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Not listed
Epoch Capabilities Index
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Not listed
LMArena Text
1,450
#55 of 149 listed

Where to run it

2 offerings · prices as listed
MeterTierPrice
OpenAI API Official Retired Global · USD gpt-5.3-chat-latest
InputStandard past price, from the vendor’s page archived Jul 25, 2026$1.75 / 1M tokens
OutputStandard past price, from the vendor’s page archived Jul 25, 2026$14.00 / 1M tokens
Cache readStandard past price, from the vendor’s page archived Jul 25, 2026$0.18 / 1M tokens
Azure OpenAI in Foundry Retired Shut down Jun 29, 2026 Global · USD gpt-5.3-chat
InputStandard $1.75 / 1M tokens
OutputStandard $14.00 / 1M tokens
Cache readStandard $0.18 / 1M tokens

Changes

All changes →
  1. Available → Retired on OpenAI API
  2. Available → Retired
  3. Available → Retired on Azure OpenAI in Foundry

Cited scores

From third-party leaderboards, not measured by us
  • LMArena Text 1,450

    #55 of 149 listed models · CI 1,446–1,454 · 34,296 votes

  • LMArena Text · Chinese 1,498

    #48 of 149 listed models · CI 1,485–1,511 · 2,258 votes

  • LMArena Text · Coding 1,497

    #57 of 149 listed models · CI 1,490–1,504 · 9,167 votes

  • LMArena (Arena), leaderboard-dataset on Hugging Face, licensed CC BY 4.0 · License · as of Oct 2, 2026
  • changes we made