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Community: Nex N2.5 Pro

nex-n2.5-pro

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Nex N2.5 Pro costs $0.0975 per million input tokens and $0.325 per million output tokens, supports 262K context, and is available through the OpenAI-compatible API.

Nex N2.5 Pro is an open-source multimodal agentic model for coding, tool use, and long-horizon workflows. It supports image input, structured output, configurable reasoning, a 262K-token context window, and up to 235K output tokens.

Modalities

Text + Image → Text

Input / output price

$0.0975 / $0.325 per 1M

Context

262K

Capabilities

ReasoningVisionTool callingLong contextOpen weights

Pricing

Billed per token actually used and deducted from your credits.

ItemUSD per 1M tokens
Input$0.0975
Output$0.325
Cached input$0.0195

Calculator

Drag the sliders to estimate what this model will cost.

Per request
$0.00055
Per day
$0.2762
Per month (30 days)
$8.29

Nex N2.5 Pro: input $0.0975/M · output $0.325/M · cached input $0.0195/M

Request with these settings
curl https://api.geniusrelaygpt.com/v1/chat/completions \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "nex-n2.5-pro", "max_tokens": 800,
       "messages": [{"role": "user", "content": "…"}]}'

Code samples

OpenAI-compatible. Set the base URL to https://api.geniusrelaygpt.com/v1 and the model to nex-n2.5-pro.

curl https://api.geniusrelaygpt.com/v1/chat/completions \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "nex-n2.5-pro",
    "stream": true,
    "messages": [{"role": "user", "content": "Hello"}]
  }'

Use it in a client: Cursor · Cline · SillyTavern · Codex

Parameters

Common OpenAI parameters can be passed as-is.

temperaturetop_pmax_tokensstreamstoppresence_penaltyfrequency_penaltyseed

FAQ

How is Nex N2.5 Pro billed?
Input is $0.0975 and output is $0.325 per million tokens; cached input is $0.0195. The charge for every request is listed in Usage Logs in the console.
How long is the context window?
262K tokens. In a long conversation every turn is billed for the full input, so keep the history under control.
Does it support streaming?
Yes. Add "stream": true to the request to receive server-sent events in the OpenAI format.
Nex N2.5 Pro API pricing · GeniusRelay