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GPT 5.1 Codex

GPT-5.1-Codex is a specialized version of GPT-5.1 optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering tasks....

Intelligence#88 / 563
35
Artificial Analysis Intelligence Index
Speed#50 / 576
173.1
Output tokens per second (median)
Input Price#448 / 576
$1.25NT$ 40
USD / 1M tokens
Output Price#486 / 576
$10.00NT$ 323
USD / 1M tokens
First-token latency#509 / 576
4.67s
Time to first token (AA median)
ProviderOpenAI
Released2025年11月
Model IDopenai/gpt-5.1-codex

Technical specifications

Context window
400K tokens
Reasoning
Yes
Input
TextImage
Output
Text

Pricing comparison

BazaarLink retail price alongside AA's observed market standard.

BazaarLink price our site

Input$1.25NT$ 40
Output$10.00NT$ 323
Cache read$0.13NT$ 4
Cache write
3:1 blended (est.)$3.44NT$ 111
All prices per 1M tokens. Supports TWD credit card / official invoice.

Market reference Artificial Analysis

Input$1.25
Output$10.00
Cache readAA not tracked
Cache writeAA not tracked
3:1 blended$3.44
✓ Matches market reference — BazaarLink does not mark up.
Source: artificialanalysis.ai

Independent benchmarks

Scores below come from Artificial Analysis, an independent third party. BazaarLink does not participate in the testing.

Intelligence 35
Coding
Math 96
MMLU 86
GPQA 86
This modelCategory leader
Overall intelligence
#88out of 563 models
Aggregated across academic benchmarks
Math reasoning
#7out of 269 models
AIME / MATH-500 / SciCode
Time to first token
#509out of 576 models
AA 全球 p50:4.67 秒
Intelligence
35
Top 16%
This model
35
Category leader
60
Median
15
Math
96
Top 3%
This model
96
Category leader
99
Median
53
MMLU Pro
86%
This model
86%
Category leader
90%
Median
75%
GPQA
86%
This model
86%
Category leader
94%
Median
68%
LiveCodeBench
85%
This model
85%
Category leader
42%
Median
42%
HLE
23%
This model
23%
Category leader
53%
Median
7%
SciCode
40%
This model
40%
Category leader
60%
Median
33%
IFBench
70%
This model
70%
Category leader
83%
Median
44%
τ²-Bench Telecom
83%
This model
83%
Category leader
99%
Median
46%
AA-LCR
67%
This model
67%
Category leader
76%
Median
39%
Terminal-Bench Hard
35%
This model
35%
Category leader
66%
Median
14%

Top 5 — CodingCoding Index leaderboard

1GPT-5.6 Sol (xhigh)openai/gpt-5-6-sol-xhigh78$5 / $30
3GPT-5.6 Sol (high)openai/gpt-5-6-sol-high77$5 / $30
AASource: Artificial Analysis · Independent third-party evaluation; not influenced by BazaarLinkView full evaluation on AA →

Quick Start

Use GPT 5.1 Codex via BazaarLink API — just change the base_url:

Python
from openai import OpenAI

client = OpenAI(
    base_url="https://bazaarlink.ai/api/v1",
    api_key="sk-bl-YOUR_API_KEY",
)

response = client.chat.completions.create(
    model="openai/gpt-5.1-codex",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)
TypeScript
import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://bazaarlink.ai/api/v1",
  apiKey: "sk-bl-YOUR_API_KEY",
});

const response = await client.chat.completions.create({
  model: "openai/gpt-5.1-codex",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(response.choices[0].message.content);

Why use GPT 5.1 Codex via BazaarLink?

  • USD billing (TWD-quoted) + unified invoices — no foreign credit card needed for Taiwan teams
  • OpenAI-compatible API — zero code changes required
  • Automatic failover — multi-provider redundancy for the same model
  • Chinese-language support — local team, instant help
Try Now← All Models

Frequently Asked Questions

What is GPT 5.1 Codex?

GPT-5.1-Codex is a specialized version of GPT-5.1 optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering tasks....

How much does the GPT 5.1 Codex API cost?

GPT 5.1 Codex costs $1.2500 per 1K input tokens and $10.0000 per 1K output tokens when accessed through BazaarLink.

How do I use GPT 5.1 Codex with the OpenAI SDK?

Set base_url to "https://bazaarlink.ai/api/v1" and use model ID "openai/gpt-5.1-codex". All OpenAI SDK methods (chat.completions, embeddings, streaming) work without code changes.

What is the context window for GPT 5.1 Codex?

GPT 5.1 Codex supports a context window of 400,000 tokens.

Is GPT 5.1 Codex available for free?

GPT 5.1 Codex is a paid model. BazaarLink offers free trial credits on registration so you can test it without a credit card.

中轉站誠信檢測 · BazaarLink 獨家

已測試 endpoint
4
獨立 hosts
1
家族指紋一致率
100%
偵測到異常
4
資料範圍
過去 90

BazaarLink Probe 對聲稱提供此模型的 endpoint 進行家族指紋驗證與 V3 子模型對照。 如發現行為與真貨基準不符,會列入異常案例。

查看完整檢測報告 →

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