GPT-5.3-Codex

openai/gpt-5.3-codex
by OpenAI · text+image+file in · text out · 400K ctx · 2026-02-24

GPT-5.3-Codex is OpenAI’s most advanced agentic coding model, combining the frontier software engine…

Endpoints:/v1/chat/completions/v1/responses
INPUT$1.75/ 1M tokens
OUTPUT$14.00/ 1M tokens
p50 TTFT929.00 s7d
p95 TTFT972.00 s7d
TRAFFIC42tokens / 7d
▶ Try in playground</> Use via API
Code samples
from openai import OpenAI

client = OpenAI(
    base_url="https://orcarouter.ai/v1",
    api_key="$ORCAROUTER_API_KEY",
)

response = client.chat.completions.create(
    model="openai/gpt-5.3-codex",
    messages=[{"role": "user", "content": "Hello"}],
)
print(response.choices[0].message.content)
Pricing
Input / 1M tokens$1.75
Output / 1M tokens$14.00
Cache read / 1M$0.175
CurrencyUSD
Performancelast 7 days
TTFT p50
929.00 s
Output speed
—
TTFT p95
972.00 s
Error rate
96.4%
Public benchmarksLast evaluated 2026-02-05
AA Coding
53.1
AA Intelligence
53.6
GPQA Diamond
91.5
Humanity's Last Exam
39.9
IFBench
75.4
Long-Context Recall
74.0
SciCode
53.2
TerminalBench Hard
53.0
τ²-Bench
86.0
Source: artificialanalysis.ai
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FAQ
How much does OpenAI: GPT-5.3-Codex cost on OrcaRouter?
OpenAI: GPT-5.3-Codex is priced at $1.75 per 1M input tokens and $14.00 per 1M output tokens via OrcaRouter. Pricing is pulled live from the routing layer.
What is OpenAI: GPT-5.3-Codex's context window?
OpenAI: GPT-5.3-Codex supports a context window of 400K tokens. Use long-context features (RAG, summarisation) up to that limit.
How do I call OpenAI: GPT-5.3-Codex via the OpenAI SDK?
Set OpenAI base_url to https://orcarouter.ai/v1, supply your OrcaRouter API key, and pass model="openai/gpt-5.3-codex" in the chat.completions.create call.
Does OrcaRouter rate-limit OpenAI: GPT-5.3-Codex?
Per-model rate limits follow your OrcaRouter plan. Free tiers ship with conservative caps; paid tiers lift them. Check /pricing for current quotas.
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