GPT-5.3 Codex

openai· 2026-02-05· 400K ctx

API onlytool callreasoningstructured quant: unknown

spread (output)

2.5×

$11.20 – $28.00 · 30 providers

30 providers priced

Provider	Input	Output	Cache rd	Blended
Ofox relay router	$1.40	$11.20	$0.144	$1.49
Poe relay router	$1.60	$13.00	$0.160	$1.72
Azure hyperscaler	$1.75	$14.00	$0.175	$1.86
Azure Cognitive Services unknown	$1.75	$14.00	$0.175	$1.86
Eden AI relay router	$1.75	$14.00	$0.175	$1.86
FastRouter relay router	$1.75	$14.00	—	$2.86^*
FreeModel unknown	$1.75	$14.00	$0.175	$2.01
FrogBot relay router	$1.75	$14.00	$0.175	$1.86
GitHub Copilot relay router	$1.75	$14.00	$0.175	$1.86
Impossibl relay router	$1.75	$14.00	$0.175	$1.86
Kilo Gateway relay router	$1.75	$14.00	$0.175	$1.86
DevPass (LLM Gateway) relay router	$1.75	$14.00	$0.175	$1.86
LLM Gateway relay router	$1.75	$14.00	$0.175	$1.86
LLM Gateway relay router	$1.75	$14.00	$0.175	$1.86
NanoGPT relay router	$1.75	$14.00	$0.175	$1.86
Neon relay router	$1.75	$14.00	$0.175	$1.86
OpenAI first party lab	$1.75	$14.00	$0.175	$1.86
OpenCode Zen relay router	$1.75	$14.00	$0.175	$1.86
OpenRouter unknown	$1.75	$14.00	$0.175	$1.86
Opper relay router	$1.75	$14.00	$0.175	$1.86
OrcaRouter relay router	$1.75	$14.00	$0.175	$1.86
Pioneer relay router	$1.75	$14.00	$0.175	$2.01
Requesty relay router	$1.75	$14.00	$0.175	$1.86
ZenMux relay router	$1.75	$14.00	—	$2.86^*
AIHubMix unknown	$1.75	$14.00	$0.175	$1.86
Vivgrid unknown	$1.75	$14.00	$0.175	$1.86
Abacus relay router	$1.75	$14.00	$0.180	$1.87
Vercel AI Gatewayoutlier unknown	$1.75	$14.00	$0.175	$1.86
Venice AIoutlier unknown	$2.19	$17.50	$0.219	$2.33
Vercel AI Gatewayoutlier unknown	$3.50	$28.00	$0.350	$3.73

Cheapest (output)

Ofox

$11.20 /M

opencode.json

{
  "provider": {
    "ofox": {
      "npm": "@ai-sdk/openai-compatible",
      "options": {
        "baseURL": "https://api.ofox.ai/v1"
      },
      "models": {
        "openai/gpt-5.3-codex": {}
      }
    }
  }
}

Set OFOX_API_KEY in your environment. Generated — verify against the OpenCode docs.

Output $/M over time7-day preview

Median line, min–max band. Pre-2026-09 points are catalog-recorded dates from models.dev git history, not provider effective dates.

Full price history & dynamics

This is a 7-day preview. Sign in for 30 days free; the full series and export are the API subscription.

Data: models.dev (MIT), snapshot 2026-09-20. Prices are vendor-published; verify before purchase. Methodology.