GPT-5.1 Codex

openai· 2025-11-13· 400K ctx

API onlyreasoning quant: unknown

spread (output)

1.2×

$8.50 – $10.00 · 19 providers

19 providers priced

Provider	Input	Output	Cache rd	Blended
OpenCode Zen relay router	$1.07	$8.50	$0.107	$1.13
Jiekou.AI relay router	$1.13	$9.00	—	$1.84^*
Poe relay router	$1.10	$9.00	$0.110	$1.19
Azure Cognitive Services unknown	$1.25	$10.00	$0.125	$1.33
Eden AI relay router	$1.25	$10.00	$0.125	$1.33
Helicone relay router	$1.25	$10.00	$0.125	$1.33
Impossibl relay router	$1.25	$10.00	$0.125	$1.33
Kilo Gateway relay router	$1.25	$10.00	$0.130	$1.33
DevPass (LLM Gateway) relay router	$1.25	$10.00	$0.125	$1.33
LLM Gateway relay router	$1.25	$10.00	—	$2.05^*
NanoGPT relay router	$1.25	$10.00	$0.125	$1.33
OpenRouter unknown	$1.25	$10.00	$0.130	$1.33
OrcaRouter relay router	$1.25	$10.00	$0.125	$1.33
Vercel AI Gateway unknown	$1.25	$10.00	$0.130	$1.33
Vivgrid unknown	$1.25	$10.00	$0.125	$1.33
Abacus relay router	$1.25	$10.00	$0.125	$1.33
ZenMux relay router	$1.25	$10.00	$0.120	$1.33
AIHubMix unknown	$1.25	$10.00	$0.125	$1.33
Azure hyperscaler	$1.25	$10.00	$0.125	$1.33

Cheapest (output)

OpenCode Zen

$8.50 /M

opencode.json

{
  "provider": {
    "opencode": {
      "npm": "@ai-sdk/openai-compatible",
      "options": {
        "baseURL": "https://opencode.ai/zen/v1"
      },
      "models": {
        "gpt-5.1-codex": {}
      }
    }
  }
}

Set OPENCODE_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.