Nex-N2.5-Pro
Nex-N2.5 is an agentic model built to turn goals into working, verified outcomes.
Model by Nex AGI
Chalk Labs
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Install
Pick your client. Read the repository before you give any tool access to your data.
{
"model": "nex-agi/nex-n2.5-pro",
"baseURL": "https://openrouter.ai/api/v1"
}OpenAI-compatible API: point any OpenAI SDK at the base URL and use this model id.
Settings it needs
OPENROUTER_API_KEYrequiredsecret
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About
Use cases: code-generation
Reviews
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Price and limits
| Variant | Input $/M tokens | Output $/M tokens | Cached input $/M |
|---|---|---|---|
| Standard | $0.075 | $0.25 | $0.015 |
Price as of Oct 26, 2026 from OpenRouter. Prices change often; check before you rely on one.
- Provider
- Nex AGI
- Model id
nex-agi/nex-n2.5-pro- Context window
- 262,144 tokens (262K)
- Max output
- 235,929 tokens
- Input
- text, image
- Output
- text
- Tool calling
- Yes
- Structured outputs
- Yes
- Reasoning
- Yes
- Weights
- Open: nex-agi/Nex-N2.5-Pro
- Released
- Sep 8, 2026
Details
- Auth
- API key
- License
- License unknown
- First seen
- Oct 24, 2026
- Last checked
- Oct 26, 2026
- Source
- OpenRouter
More from Nex AGI
Done for you
Rather not set it up yourself?
Chalk Labs scopes, builds and runs agents for your team: the task audit, the eval harness, the integrations and the weekly ops report. Fixed scope, priced before we start.
See how we build AI agents →Read the case studies
Chalk Labs is a two-founder AI and growth studio. We build AI agents, CRMs and MVPs for Web3 and AI companies, and have shipped 50+ product and token launches.
- launches shipped
- 50+
- launches shipped
- media placements
- 500+
- media placements
- founders on every account
- 2
- founders on every account
Press we've placed: Forbes · CoinDesk · Decrypt · Cointelegraph · The Block
Rahil Jain, Co-founder, Chalk Labs. Ex-Goldman Sachs engineer. You talk to the person who builds it.
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Cite this page
Nex-N2.5-Pro: price, context window, tool use. Agent Mart. https://agentmart.dev/models/nex-agi-nex-n2-5-pro (last updated 2026-10-26)