Last refreshed 2026-06-30. Next refresh: weekly.
Why use GPT-5.2 Codex on Vercel AI Gateway?
Vercel AI Gateway offers GPT-5.2 Codex with pay-as-you-go pricing at $1.75/1M input tokens. Vercel AI Gateway is a unified AI proxy providing a single OpenAI-compatible API endpoint to 275+ models from 25+ providers including Anthropic, OpenAI, Google, Meta, Mistral, DeepSeek, xAI, Alibaba, Amazon, ByteDance, Cohere, MiniMax, MoonshotAI, KwaiPilot, Black Forest Labs, Recraft, Voyage AI, NVIDIA, and more.
Compare GPT-5.2 Codex across 2 providers to find the best fit for your use caseSetup recipe
Python + curlpip install openaiexport AI_GATEWAY_API_KEY=...import os
from openai import OpenAI
client = OpenAI(
api_key=os.environ["AI_GATEWAY_API_KEY"],openai/gpt-5.2-codexRequest example
import os
from openai import OpenAI
client = OpenAI(
api_key=os.environ["AI_GATEWAY_API_KEY"],
base_url="https://ai-gateway.vercel.sh/v1"
)
response = client.chat.completions.create(
model="openai/gpt-5.2-codex",
messages=[{"role": "user", "content": "Hello"}]
)
print(response.choices[0].message.content)Gotchas
- Use provider model ID "openai/gpt-5.2-codex", not the LLMReference slug "gpt-5.2-codex".
- creator/model-name e.g. kwaipilot/kat-coder-pro-v2
- The examples expect AI_GATEWAY_API_KEY; rename it only if your application config maps the new variable.
Compare GPT-5.2 Codex Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| Vercel AI Gateway | $1.75 | $14.00 |
| OpenAI API | $1.75 | $14.00 |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $1.75 |
| Output tokens | $14.00 |
| Query | $10.00 |
Capabilities
About GPT-5.2 Codex
GPT-5.2-Codex is OpenAI's agentic coding model built on GPT-5.2, released December 18, 2025. Optimized for long-horizon professional software engineering tasks including large refactors, multi-file changes, and codebase migrations. Features context compaction for handling tasks exceeding a single context window, enhanced vision for interpreting screenshots, diagrams, and UI, and strengthened safeguards for defensive cybersecurity workflows. Available to paid ChatGPT users and via the Responses API.
FAQ
What does GPT-5.2 Codex cost on Vercel AI Gateway?
On Vercel AI Gateway, GPT-5.2 Codex costs $1.75 per 1M input tokens and $14 per 1M output tokens.
What is the context window for GPT-5.2 Codex on Vercel AI Gateway?
GPT-5.2 Codex supports a 400k token context window on Vercel AI Gateway.
How does Vercel AI Gateway compare to other GPT-5.2 Codex providers?
GPT-5.2 Codex is available from 2 providers. The cheapest input pricing is $1.75/1M tokens from Vercel AI Gateway.
What API model ID do I use for GPT-5.2 Codex on Vercel AI Gateway?
Use the model ID openai/gpt-5.2-codex when calling Vercel AI Gateway's API.
Who created GPT-5.2 Codex?
GPT-5.2 Codex was created by OpenAI as part of the GPT-5 model family.
Is GPT-5.2 Codex open source?
GPT-5.2 Codex is not open source; the seed data lists it as proprietary.