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LLM & Chat Model APIs

ApexApi puts every major large language model behind one OpenAI-compatible endpoint and a single key. Compare GPT, Claude, Gemini, DeepSeek, Mistral, Qwen and more on price, context window, and capabilities, then switch between them by changing one string in your request. Pay per use, with no subscription and no lock-in.

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80 LLM & Chat models on ApexApi

ModelPrice /1M tokens
Claude Fable 5

anthropic/claude-fable-5

$12.00 / $60.00
Claude Haiku 4.5

anthropic/claude-haiku-4.5

$1.20 / $6.00
Claude Opus 4.5

anthropic/claude-opus-4.5

$6.00 / $30.00
Claude Opus 4.6

anthropic/claude-opus-4.6

$6.00 / $30.00
Claude Opus 4.7

anthropic/claude-opus-4.7

$6.00 / $30.00
Claude Opus 4.8

anthropic/claude-opus-4.8

$6.00 / $30.00
Claude Sonnet 4.6

anthropic/claude-sonnet-4.6

$3.60 / $18.00
DeepSeek V4 Flash

deepseek/deepseek-v4-flash

$0.12 / $0.24
DeepSeek V4 Pro

deepseek/deepseek-v4-pro

$0.53 / $1.04
Gemini 2.5 Flash

google/gemini-2.5-flash

$0.36 / $3.00
Nano Banana

google/gemini-2.5-flash-image

$0.36 / $3.00
Gemini 2.5 Flash Lite

google/gemini-2.5-flash-lite

$0.12 / $0.48
Gemini 2.5 Pro

google/gemini-2.5-pro

$1.50 / $12.00
Gemini 3 Flash Preview

google/gemini-3-flash-preview

$0.60 / $3.60
Gemini 3.1 Flash Lite

google/gemini-3.1-flash-lite

$0.30 / $1.80
Gemini 3.1 Flash Lite Preview

google/gemini-3.1-flash-lite-preview

$0.30 / $1.80
Gemini 3.1 Pro Preview

google/gemini-3.1-pro-preview

$2.40 / $14.40
Gemini 3.1 Pro Preview Custom Tools

google/gemini-3.1-pro-preview-customtools

$2.40 / $14.40
Gemini 3.5 Flash

google/gemini-3.5-flash

$1.80 / $10.80
Gemma 4 26B A4B

google/gemma-4-26b-a4b-it

$0.07 / $0.40
Gemma 4 31B

google/gemma-4-31b-it

$0.14 / $0.44
MiniMax M2.5

minimax/minimax-m2.5

$0.36 / $1.44
Codestral 2508

mistralai/codestral-2508

$0.36 / $1.08
Devstral 2 2512

mistralai/devstral-2512

$0.48 / $2.40
Ministral 3 14B 2512

mistralai/ministral-14b-2512

$0.24 / $0.24
Ministral 3 3B 2512

mistralai/ministral-3b-2512

$0.12 / $0.12
Ministral 3 8B 2512

mistralai/ministral-8b-2512

$0.18 / $0.18
Mistral Large 3 2512

mistralai/mistral-large-2512

$0.60 / $1.80
Mistral Medium 3

mistralai/mistral-medium-3

$0.48 / $2.40
Mistral Medium 3.5

mistralai/mistral-medium-3-5

$1.80 / $9.00
Mistral Small 4

mistralai/mistral-small-2603

$0.18 / $0.72
Pixtral Large 2411

mistralai/pixtral-large-2411

$2.40 / $7.20
Kimi K2 Thinking

moonshotai/kimi-k2-thinking

$0.72 / $3.00
Kimi K2.5

moonshotai/kimi-k2.5

$0.72 / $3.60
GPT-3.5 Turbo

openai/gpt-3.5-turbo

$0.60 / $1.80
GPT-3.5 Turbo 16k

openai/gpt-3.5-turbo-16k

$3.60 / $4.80
GPT-4

openai/gpt-4

$36.00 / $72.00
GPT-4 Turbo

openai/gpt-4-turbo

$12.00 / $36.00
GPT-4.1

openai/gpt-4.1

$2.40 / $9.60
GPT-4.1 Mini

openai/gpt-4.1-mini

$0.48 / $1.92
GPT-4.1 Nano

openai/gpt-4.1-nano

$0.12 / $0.48
GPT-4o

openai/gpt-4o

$3.00 / $12.00
GPT-4o

openai/gpt-4o-2024-05-13

$6.00 / $18.00
GPT-4o

openai/gpt-4o-2024-08-06

$3.00 / $12.00
GPT-4o

openai/gpt-4o-2024-11-20

$3.00 / $12.00
GPT-4o-mini

openai/gpt-4o-mini

$0.18 / $0.72
GPT-4o-mini

openai/gpt-4o-mini-2024-07-18

$0.18 / $0.72
GPT-4o-mini Search Preview

openai/gpt-4o-mini-search-preview

$0.18 / $0.72
GPT-4o Search Preview

openai/gpt-4o-search-preview

$3.00 / $12.00
GPT-5

openai/gpt-5

$1.50 / $12.00
GPT-5 Chat

openai/gpt-5-chat-latest

$1.50 / $12.00
GPT-5 Mini

openai/gpt-5-mini

$0.30 / $2.40
GPT-5 Nano

openai/gpt-5-nano

$0.06 / $0.48
GPT-5.1

openai/gpt-5.1

$1.50 / $12.00
GPT-5.2

openai/gpt-5.2

$2.10 / $16.80
GPT-5.4

openai/gpt-5.4

$3.00 / $18.00
GPT-5.4 Mini

openai/gpt-5.4-mini

$0.90 / $5.40
GPT-5.4 Nano

openai/gpt-5.4-nano

$0.24 / $1.50
GPT-5.5

openai/gpt-5.5

$6.00 / $36.00
GPT-5.6 Luna

openai/gpt-5.6-luna

$1.20 / $7.20
GPT-5.6 Sol

openai/gpt-5.6-sol

$6.00 / $36.00
GPT-5.6 Terra

openai/gpt-5.6-terra

$3.00 / $18.00
GPT-OSS 120B

openai/gpt-oss-120b

$0.18 / $0.72
GPT-OSS 20B

openai/gpt-oss-20b

$0.08 / $0.36
o1

openai/o1

$18.00 / $72.00
o3

openai/o3

$2.40 / $9.60
o3 Mini

openai/o3-mini

$1.32 / $5.28
o4 Mini

openai/o4-mini

$1.32 / $5.28
Qwen3 Coder Plus

qwen/qwen3-coder-plus

$1.20 / $6.00
Qwen3 Max

qwen/qwen3-max

$0.43 / $1.73
Qwen3 VL Flash

qwen/qwen3-vl-flash

$0.04 / $0.26
Qwen3 VL Plus

qwen/qwen3-vl-plus

$0.18 / $1.73
Qwen3.5 Flash

qwen/qwen3.5-flash

$0.04 / $0.35
Qwen3.5 Plus

qwen/qwen3.5-plus

$0.14 / $0.83
Qwen3.6 Flash

qwen/qwen3.6-flash

$0.30 / $1.80
Qwen3.7 Max

qwen/qwen3.7-max

$3.00 / $9.00
Qwen3.7 Plus

qwen/qwen3.7-plus

$0.48 / $1.92
GLM 4.7

zai/glm-4.7

$0.72 / $2.64
GLM 4.7 Flash

zai/glm-4.7-flash

$0.08 / $0.48
GLM 5

zai/glm-5

$1.20 / $3.84

Why build on ApexApi

One API, every model

OpenAI-compatible. Swap the base URL and key, keep your code. Call 14+ providers and hundreds of models through a single integration.

Smart routing & failover

Per-model provider chains with automatic failover. If one provider degrades, requests route to the next. Your app stays up.

Pay-per-use, no lock-in

Buy credits, pay only for what you call. No subscriptions, no minimums. Switch models anytime with a single string change.

Frequently asked questions

How do I call an LLM through ApexApi?
Point any OpenAI SDK at https://api.apexapi.dev/v1 with your ak- key, then set the model to the slug you want (for example openai/gpt-5.5 or anthropic/claude-opus-4.7). The interface is OpenAI-compatible, so existing code works with a changed base URL and key.
Which LLM should I use?
It depends on the job. Frontier models like GPT-5.5, Claude Opus, and Gemini Pro lead on hard reasoning and agentic work, while smaller or open models cost far less for high-volume tasks. Because every model shares one key and one format, you can A/B them on your own prompts and let the numbers decide.
Can I switch between LLMs without re-integrating?
Yes. Change a single string, the model slug, to call any other model through the same endpoint and key. No new account, SDK, or billing setup.