Skip to content
AnyRouter

GPT-5.3 Codex Spark

Tools
openai/gpt-5.3-codex-spark

Text · 200K context · Mar 2026 · 1 upstreams

GPT-5.3 Codex Spark is OpenAI's low-latency variant of GPT-5.3 Codex, tuned for fast iterative coding in the Codex environment. It is text-only and supports reasoning, streaming and function calling.

Needs your own keyTo use GPT-5.3 Codex Spark, add a key from OpenCode Zen. AnyRouter adds no fee.
context
200K
input
—
output
—
routes
1
speed, 24h
No data yet

Upstreams

1
  1. 1OpenCode ZenYour keynot addedBilled to your key

Benchmarks

GPQA Diamond
70.0%

Quick start

curl
curl https://anyrouter.dev/api/v1/chat/completions \
  -H "Authorization: Bearer $ANYROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "openai/gpt-5.3-codex-spark",
  "messages": [
    {
      "role": "user",
      "content": "Say hi in 3 words."
    }
  ]
}'

Details

Owner
OpenAI
Kind
Chat
Released
Mar 2026
Context
200K
Data policy
Provider retention
Endpoint
/api/v1/chat/completions