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GPT Oss 120b API Pricing & Quick Start

gpt-oss-120b is an open-weight, 117B-parameter Mixture-of-Experts (MoE) language model from OpenAI designed for high-reasoning, agentic, and general-purpose production use cases. It activates 5.1B parameters per forward pass and is optimized...

Intelligence#297 / 638
12
Artificial Analysis Intelligence Index
Speed#40 / 329
187.1
Output tokens per second (median)
Input Price#91 / 437
$0.15NT$ 5
USD / 1M tokens
Output Price#112 / 437
$0.60NT$ 19
USD / 1M tokens
First-token latency#33 / 329
0.82s
Time to first token (AA median)
ProviderOpenAI
ReleasedAugust 2025
Model IDopenai/gpt-oss-120b

Technical specifications

Context window
131K tokens
Reasoning
Yes
Input
Text
Output
Text

Pricing comparison

BazaarLink retail price alongside AA's observed market standard.

BazaarLink price our site

Input$0.15NT$ 5
Output$0.60NT$ 19
Cache read
Cache write
3:1 blended (est.)$0.26NT$ 8
All prices per 1M tokens. Supports TWD credit card / official invoice.

Market reference Artificial Analysis

Input$0.15
Output$0.59
Cache readAA not tracked
Cache writeAA not tracked
3:1 blended$0.26
✓ 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 12
Coding 30
Math 93
MMLU 81
GPQA 78
This modelCategory leader
Coding ability
#162out of 255 models
LiveCodeBench / SciCode and similar
Overall intelligence
#297out of 638 models
Aggregated across academic benchmarks
Time to first token
#33out of 329 models
AA 全球 p50:0.82 秒
Intelligence
12
Mid-tier
This model
12
Category leader
53
Median
12
Coding
30
Mid-tier
This model
30
Category leader
82
Median
45
Math
93
This model
93
Category leader
99
Median
53
MMLU Pro
81%
This model
81%
Category leader
90%
Median
75%
GPQA
78%
This model
78%
Category leader
94%
Median
69%
LiveCodeBench
88%
This model
88%
Category leader
42%
Median
42%
HLE
19%
This model
19%
Category leader
53%
Median
7%
SciCode
39%
This model
39%
Category leader
60%
Median
34%
IFBench
69%
This model
69%
Category leader
83%
Median
44%
τ²-Bench Telecom
66%
This model
66%
Category leader
99%
Median
46%
AA-LCR
51%
This model
51%
Category leader
76%
Median
40%
Terminal-Bench Hard
23%
This model
23%
Category leader
66%
Median
14%

Top 5 — CodingCoding Index leaderboard

2Claude Fable 5.1 (Adaptive Reasoning, Xhigh Effort, Default Fallback)?/claude-fable-5-1-xhigh81$10 / $50
3Claude Fable 5.1 (Adaptive Reasoning, High Effort, Default Fallback)?/claude-fable-5-1-high79$10 / $50
4GPT-5.6 Sol (xhigh)openai/gpt-5-6-sol-xhigh78$4 / $20
AASource: Artificial Analysis · Independent third-party evaluation; not influenced by BazaarLinkView full evaluation on AA →

Quick Start

Use GPT Oss 120b via BazaarLink API — just change the base_url:

Python
from openai import OpenAI

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

response = client.chat.completions.create(
    model="openai/gpt-oss-120b",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)
TypeScript
import OpenAI from "openai";

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

const response = await client.chat.completions.create({
  model: "openai/gpt-oss-120b",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(response.choices[0].message.content);

Why use GPT Oss 120b 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 Oss 120b?

gpt-oss-120b is an open-weight, 117B-parameter Mixture-of-Experts (MoE) language model from OpenAI designed for high-reasoning, agentic, and general-purpose production use cases. It activates 5.1B parameters per forward pass and is optimized...

How much does the GPT Oss 120b API cost?

GPT Oss 120b costs $0.15 per 1M input tokens and $0.60 per 1M output tokens when accessed through BazaarLink.

How do I use GPT Oss 120b with the OpenAI SDK?

Set base_url to "https://api.bazaarlink.ai/v1" and use model ID "openai/gpt-oss-120b". All OpenAI SDK methods (chat.completions, embeddings, streaming) work without code changes.

What is the context window for GPT Oss 120b?

GPT Oss 120b supports a context window of 131,072 tokens.

Is GPT Oss 120b available for free?

GPT Oss 120b is a paid model. BazaarLink offers free trial credits on registration so you can test it without a credit card.

Relay integrity checks

Tested endpoints
8 runs
Independent hosts
4
Model-family fingerprint match
13%
Anomalies detected
3 runs
Data range
past 90 days

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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