in the loop

GPT-5.3 Codex
#18 of 274 scored.

OpenAIFeb 5, 2026Closed

Capabilities Index

Range 152.8–160.7

156.8

Context

Takes text, image, file

400K

Input

Per 1M tokens

$1.75

Output

Per 1M tokens

$14

Benchmarks

How it scores.

  • SWE-bench Verified74.8%

    15th of 32

  • Terminal-Bench78.4%

    6th of 35

Everything else Epoch has for it

  • WeirdML79.3%
  • METR Time Horizons74.5%

On the index

Around it.

  1. #15Kimi K3Moonshot · $0.80 in157.4
  2. #16Gemini 3.7 FlashGoogle · $0.75 in157.3
  3. #17GPT-5.4OpenAI · $2.50 in156.8
  4. #18GPT-5.3 CodexOpenAI · $1.75 in156.8
  5. #19Muse Spark 1.3Meta · $1.25 in156.8
  6. #20Gemini 3.8 FlashGoogle · $0.75 in156.7
  7. #21Grok 4.6xAI · $2.00 in156.4

Sources