Notes

Health checks: Scope: the 72-hour chart and recent availability measure API connectivity only. Each bar summarizes one hour of checks. Targets: LMSpeed tries the configured health check URL and provider status URL first, then API endpoints derived from known API hosts and recent speed-test base URLs. A website host is considered only when it looks like an API endpoint. Probe steps: each candidate goes through DNS lookup, TCP connection, TLS handshake for HTTPS, and an HTTP HEAD request with redirects followed. Probing stops after the first reachable candidate. Reachable criteria: every required network step must succeed. An HTTP response below 500 is treated as reachable, including 401 because it confirms that an authenticated API endpoint responded, except for statuses classified as blocked. Blocked results: HTTP 403, 429, 521, 525, and 530, plus detected WAF or Cloudflare challenges, are shown as blocked and excluded from availability calculations because LMSpeed cannot determine whether the API itself is down. Model availability: when a dedicated test key is configured, LMSpeed sends an authenticated GET request to a derived /models endpoint and compares returned model IDs with this provider's listed models. These per-model results appear in Models & Pricing and are not included in the provider connectivity percentage. Timeouts: TCP connection, TLS handshake, HTTP connectivity, and model requests each use a 5-second timeout. A full run can take longer when several candidates are tried. Frequency: a background worker checks all providers every 5 minutes by default. The 72-hour chart combines those samples into hourly bars, and the schedule may be changed by the service operator. Limit: automated samples are not an SLA and do not guarantee account quota, every model, every region, or successful completion requests. Check the provider's own status page before making operational decisions.

Domain Rating data is sourced from Ahrefs. It is a 0–100 backlink-based domain strength signal and does not measure API speed or reliability.

Announcements and FAQ are read from this provider's NewAPI status snapshot when available. LMSpeed stores the original content and optional English translations from the provider status source, then shows the localized fields on this page.

Codex API is a unified gateway that aggregates access to various large language models (LLMs) and AI services. It offers a single API interface compatible with multiple providers, allowing developers to switch between models by changing the base URL. Key endpoints include chat completions, embeddings, image generation, audio processing, and model management. Supported providers include OpenAI, Anthropic Claude, Google Gemini, MoonshotAI, Zhipu, DeepSeek, Qwen, and over 30 others. The service emphasizes competitive pricing and stability without subscription requirements, using a pay-as-you-go model. Typical use cases include AI-powered applications requiring multi-model flexibility, cost optimization across providers, and simplified integration with diverse AI capabilities.

Model

Input ($/M)

Output ($/M)

Audit

Speed

Latency

coder-modeldefault

$1.60/M

—

gpt-5.4-minidefault

$1.20/M

$7.20/M

—

gpt-5.4-mini-openai-compactdefault

$1.20/M

$7.20/M

—

gpt-5.4default

$6.40/M

$38.40/M

—

52.5 t/s

3.21 s

gpt-5.4-openai-compactdefault

$6.40/M

$38.40/M

—

gpt-5.3-codexdefault

$2.80/M

$22.40/M

—

gpt-5.3-codex-openai-compactdefault

$2.80/M

$22.40/M

—

kimi-k2.5default

$1.20/M

—

gpt-5.2default

$2.80/M

$22.40/M

—

gpt-5.1-codex-openai-compactdefault

$1.60/M

$12.80/M

—

Time

Model

Speed

Latency

Apr 8, 02:28 AM

gpt-5.4

52.55 tok/s

3.21s

Provider

Why compare

Models

Free

Avg price

Speed

30d uptime

Codex API

codex-ai02-cn

Codex API provides AI model access through OpenAI-compatible endpoints with support for Claude, GPT, and Gemini models.

Current provider baseline

N/A

53 tok/s

99.2%

向量引擎

api-vectorengine-ai

Vector Engine provides an API platform aggregating access to over 500 AI large models with OpenAI API compatibility and global deployment.

Faster measured speed
Higher 30-day availability
Broader model coverage

182

$6.08/M

89 tok/s

99.6%

api-n1n-ai

N1N provides API access to a wide range of AI models including GPT-4, Claude 3, Gemini, and others for text, image, and video generation.

Faster measured speed
Higher 30-day availability
Broader model coverage

177

$8.65/M

90 tok/s

99.7%

api-futureppo-top

Future Hub is a large-scale OpenAI-compatible API gateway at api.futureppo.top with extensive model coverage and pricing data.

Faster measured speed
More free-model options
Broader model coverage

132

223

N/A

263 tok/s

0.6%

x666-me

X666 API is an OpenAI-compatible API relay offering access to multiple AI models with competitive pricing and high availability.

Faster measured speed
Higher 30-day availability
Broader model coverage

$0.0013/M

77 tok/s

99.4%

zhipu-ai

Zhipu AI provides the GLM series of large language models including GLM-4, ChatGLM, and CodeGeeX for text, code, and multimodal tasks.

Faster measured speed
Higher 30-day availability
Broader model coverage

N/A

59 tok/s

99.4%

api-kr777-top

CaMeL AI provides an OpenAI-compatible API gateway with extensive model coverage and pricing options.

Faster measured speed
Broader model coverage

194

$88.81/M

93 tok/s

99.1%

Codex API

Codex API

Features

API Endpoints

Notes

Health Check

API Benchmarks & Pricing

Recent Test Records

Similar API Provider Alternatives to Compare

Similar API Provider Alternatives to Compare

Provider	Why compare	Models	Free	Avg price	Speed	30d uptime
Codex API codex-ai02-cn Codex API provides AI model access through OpenAI-compatible endpoints with support for Claude, GPT, and Gemini models.	Current provider baseline	17	13	N/A	53 tok/s	99.2%
向量引擎 api-vectorengine-ai Vector Engine provides an API platform aggregating access to over 500 AI large models with OpenAI API compatibility and global deployment.	Faster measured speed Higher 30-day availability Broader model coverage	182	6	$6.08/M	89 tok/s	99.6%
api-n1n-ai N1N provides API access to a wide range of AI models including GPT-4, Claude 3, Gemini, and others for text, image, and video generation.	Faster measured speed Higher 30-day availability Broader model coverage	177	6	$8.65/M	90 tok/s	99.7%
api-futureppo-top Future Hub is a large-scale OpenAI-compatible API gateway at api.futureppo.top with extensive model coverage and pricing data.	Faster measured speed More free-model options Broader model coverage	132	223	N/A	263 tok/s	0.6%
x666-me X666 API is an OpenAI-compatible API relay offering access to multiple AI models with competitive pricing and high availability.	Faster measured speed Higher 30-day availability Broader model coverage	25	0	$0.0013/M	77 tok/s	99.4%
zhipu-ai Zhipu AI provides the GLM series of large language models including GLM-4, ChatGLM, and CodeGeeX for text, code, and multimodal tasks.	Faster measured speed Higher 30-day availability Broader model coverage	22	0	N/A	59 tok/s	99.4%
api-kr777-top CaMeL AI provides an OpenAI-compatible API gateway with extensive model coverage and pricing options.	Faster measured speed Broader model coverage	194	4	$88.81/M	93 tok/s	99.1%

Codex API

Codex API

Features

API Endpoints

Notes

About Codex API

Health Check

API Benchmarks & Pricing

Recent Test Records

Similar API Provider Alternatives to Compare

Similar API Provider Alternatives to Compare