GPT-5.3 Codex Spark API Pricing
GPT-5.3 Codex Spark is available through LiteLLM. It has a 128,000-token context window and returns up to 128,000 tokens per response.
- Context window
- 128,000 tokens
- Max output
- 128,000 tokens
- Providers
- 1
- Added to LiteLLM
- March 2026
GPT-5.3 Codex Spark pricing by provider
1 listing across 1 provider. Token prices are in US dollars per 1M tokens. The highlighted row is the price quoted above.
| Provider | Model name in LiteLLM | Context |
|---|---|---|
| ChatGPT Subscription | chatgpt/gpt-5.3-codex-spark | 128K |
GPT-5.3 Codex Spark features
- Function calling
- Parallel tool calls
- Structured output
- Image input
Use GPT-5.3 Codex Spark with LiteLLM
Call GPT-5.3 Codex Spark through the LiteLLM Python SDK, or put it behind the LiteLLM proxy and send OpenAI-format requests to /v1/responses. LiteLLM tracks the cost of every request at these prices.
from litellm import completion
response = completion(
model="chatgpt/gpt-5.3-codex-spark",
messages=[{"role": "user", "content": "Hello!"}],
)curl http://0.0.0.0:4000/v1/chat/completions \
-H "Content-Type: application/json" \
-H "Authorization: Bearer sk-1234" \
-d '{
"model": "gpt-5.3-codex-spark",
"messages": [{"role": "user", "content": "Hello!"}]
}'GPT-5.3 Codex Spark FAQ
What is the context window of GPT-5.3 Codex Spark?
GPT-5.3 Codex Spark has a 128,000-token context window and returns up to 128,000 tokens per response.
What features does GPT-5.3 Codex Spark support?
GPT-5.3 Codex Spark supports function calling, parallel tool calls, structured output and image input.
When did LiteLLM add GPT-5.3 Codex Spark?
GPT-5.3 Codex Spark was added to LiteLLM's model price file in March 2026.
Sources
Prices come from LiteLLM's open-source model_prices_and_context_window.json, which LiteLLM uses to calculate the cost of every request.
LiteLLM docs: ChatGPT Subscription.
Provider pages: ChatGPT Subscription.