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GPT 5.1 Codex Mini API Pricing & Quick Start

GPT-5.1-Codex-Mini is a smaller and faster version of GPT-5.1-Codex

Intelligence#133 / 573
31
Artificial Analysis Intelligence Index
Speed#166 / 586
0.0
Output tokens per second (median)
Input Price#311 / 586
$0.25NT$ 8
USD / 1M tokens
Output Price#362 / 586
$2.00NT$ 65
USD / 1M tokens
First-token latency#1 / 586
0.00s
Time to first token (AA median)
ProviderOpenAI
ReleasedNovember 2025
Model IDopenai/gpt-5.1-codex-mini

Technical specifications

Context window
400K tokens
Reasoning
Yes
Input
ImageText
Output
Text

Pricing comparison

BazaarLink retail price alongside AA's observed market standard.

BazaarLink price our site

Input$0.25NT$ 8
Output$2.00NT$ 65
Cache read$0.03NT$ 1
Cache write
3:1 blended (est.)$0.69NT$ 22
All prices per 1M tokens. Supports TWD credit card / official invoice.

Market reference Artificial Analysis

Input$0.25
Output$2.00
Cache readAA not tracked
Cache writeAA not tracked
3:1 blended$0.69
✓ 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 31
Coding
Math 92
MMLU 82
GPQA 81
This modelCategory leader
Overall intelligence
#133out of 573 models
Aggregated across academic benchmarks
Math reasoning
#18out of 269 models
AIME / MATH-500 / SciCode
Time to first token
🥇
#1out of 586 models
AA 全球 p50:0.00 秒
Intelligence
31
Top 23%
This model
31
Category leader
61
Median
15
Math
92
Top 7%
This model
92
Category leader
99
Median
53
MMLU Pro
82%
This model
82%
Category leader
90%
Median
75%
GPQA
81%
This model
81%
Category leader
94%
Median
69%
LiveCodeBench
84%
This model
84%
Category leader
42%
Median
42%
HLE
17%
This model
17%
Category leader
53%
Median
7%
SciCode
43%
This model
43%
Category leader
60%
Median
33%
IFBench
68%
This model
68%
Category leader
83%
Median
44%
τ²-Bench Telecom
63%
This model
63%
Category leader
99%
Median
46%
AA-LCR
63%
This model
63%
Category leader
76%
Median
40%
Terminal-Bench Hard
33%
This model
33%
Category leader
66%
Median
14%

Top 5 — CodingCoding Index leaderboard

1GPT-5.6 Sol (xhigh)openai/gpt-5-6-sol-xhigh78$5 / $30
4GPT-5.6 Sol (high)openai/gpt-5-6-sol-high77$5 / $30
5Claude Opus 5 (Adaptive Reasoning, Xhigh Effort)anthropic/claude-opus-5-xhigh77$5 / $25
AASource: Artificial Analysis · Independent third-party evaluation; not influenced by BazaarLinkView full evaluation on AA →

Quick Start

Use GPT 5.1 Codex Mini 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-mini",
    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-mini",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(response.choices[0].message.content);

Why use GPT 5.1 Codex Mini 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 Mini?

GPT-5.1-Codex-Mini is a smaller and faster version of GPT-5.1-Codex

How much does the GPT 5.1 Codex Mini API cost?

GPT 5.1 Codex Mini costs $0.2500 per 1M input tokens and $2.0000 per 1M output tokens when accessed through BazaarLink.

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

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

What is the context window for GPT 5.1 Codex Mini?

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

Is GPT 5.1 Codex Mini available for free?

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

Relay integrity checks

No integrity-check data is available for this model yet.

BazaarLink Probe verifies endpoints that claim to serve this model and flags behavior that differs from the reference baseline.

View the full integrity report →

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