Open-source AI infrastructure

GPT-5.3 Codex Spark

Review GPT-5.3 Codex Spark on OpenAI: token pricing, context window, capabilities, modalities, and routing details in the Everstack model catalog.

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GPT-5.3 Codex Spark pricing and limits on OpenAI

Token pricing through OpenAI: $1.75 per million input tokens, $14.00 per million output tokens. Limits: 128K token context window, 32K max output tokens.

Capabilities and modalities

Supported capabilities: chat, function_calling, vision, reasoning. Accepts text, image, pdf input. Returns text output. Model family: gpt-5. Catalog status: stable.

Routing GPT-5.3 Codex Spark through Everstack

Call GPT-5.3 Codex Spark on OpenAI through one OpenAI-compatible endpoint, with provider fallback, semantic caching, per-tenant rate limits, and OpenTelemetry traces for latency, tokens, and cost.