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01

Providers + pricing

CapabilitiesProvider details
● Your own key · billed by your provider · AnyRouter fee $0
OpenCode Zen
opencode-zen-byok
BYOK—
Unavailable
● Free pool · donated keys · not available for this model — donate a key
02

Try it

POST /api/v1/chat/completions
import { createAnyRouter } from "@anyr/ai-sdk-provider"import { generateText } from "ai" const anyrouter = createAnyRouter() const { text } = await generateText({  model: anyrouter("openai/gpt-5.3-codex-spark"),  prompt: "Say hi in 3 words.",})console.log(text)
Set ANYROUTER_API_KEY · edits on the demo update this code
Live demo

Type a prompt and run it on this model.

03

Uptime + latency

—recent checks · all routes

No health checks recorded for this model yet.

24h
No traffic in the last 24h.
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Uptime & Health
No uptime data yet

These providers haven't been health-probed for this model yet. The router still routes around upstreams that fail live requests — uptime fills in once probe history accrues.

GPT-5.3 Codex Spark

  • OpenCode Zen
Texttext → text200Ktoken context
Context
200K
Input
$0
Output
$0
TTFT
—
Uptime
—
Routes
1
04

Your access

Credits
Your own key · AnyRouter fee $0

Run GPT-5.3 Codex Spark on your own key — your requests are billed by the provider. Pool callers pay AnyRouter credits.

No BYOK keys configured for this model yet.

Share a key with the pool to earn credits for every request it serves, covering your plan cost.

Free poolnot in pool yetDonate key →
Create API key for this model
Text generation
Context length200,000 tokens
Max output64,000 tokens
ArchitectureTransformer
Categorytext
ReleasedMar 4, 2026
Modalities
Capabilities
05

About

GPT-5.3 Codex Spark is a low-latency, lower-cost variant of GPT-5.3 Codex tuned for fast iterative coding inside the Codex environment, with streaming and function calling. Served through OpenAI's Responses API.

Released 2026-03-04

API & code
Share cards
GPT-5.3 Codex Spark share card
GPT-5.3 Codex Spark
OpenCode Zen upstream share card
OpenCode Zen upstream
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