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#7

GPT-5.3-Codex

OpenAI Release: 2026-02-05 Tested on: 2026-04-11 01:44 openai/gpt-5.3-codex::medium

Summary

GPT-5.3-Codex scores 8.6 on AI BENCHY and ranks #7. It has N/A reliability, a 83.3% pass rate, $0.573 total cost, and 15.38s average response time.

What makes GPT-5.3-Codex unique: Its total benchmark cost is unusually low for its score range.

Score

8.6

Consistency

8.7

Reliability

N/A

Total Cost (Current Price)

$0.573

Total Output Tokens

37,458

Total Input Tokens

0

Input Price

$1.750 / 1M

Output Price

$14.000 / 1M

Tests Correct

Wrong Tests: 5

Attempt pass rate: 83.3%

Flaky tests

3

Flaky tests had mixed outcomes across runs (at least one pass and one fail).

Response Time (avg)

15.38s

Response Time (max): 100.93s

Response Time (total): 276.91s

Wrong answer: 3 Did not follow instructions: 2

Generation showcase

Hamster playing table tennis

Prompt: Create a detailed SVG illustration of a hamster playing table tennis.

#7 GPT-5.3-Codex

medium
Cost
$0.049
Time
54.9s
Tokens
3,580 tok

Run history

Tested on Score Reliability Tests Correct Total Cost Compare
2026-06-04 13:45 New test added 8.4 10.0 $0.740 Compare
2026-05-22 00:19 Re-test 8.3 10.0 $0.685 Compare
2026-04-11 01:44 First recorded run 8.6 N/A $0.573 Current run

Charts

Choose the first model, then click a second model to open a side-by-side page.

Total Output Tokens

Score vs Total Output Tokens

Quick Compare

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Category Breakdown

Category Score Consistency Tests Correct
Anti-AI Tricks 8.7 7.9
Coding 10.0 10.0
Combined 10.0 10.0
Data parsing and extraction 10.0 10.0
Domain specific 5.9 7.2
General Intelligence 4.6 10.0
Instructions following 10.0 10.0
Puzzle Solving 9.0 7.9
Tool Calling 10.0 10.0

Compared models