Solutions
Cheap AI API for coding
For coding agents and code completion that burn lots of tokens, Somnus gives you 13 models on one OpenAI-compatible key. Usage is billed at list price but every top-up is credited 2× to 2.5×, so DeepSeek V4 Flash — the cheapest option here — effectively costs $0.11 / $0.33 per 1M input/output tokens.
Choosing a cheap ai api for coding
Coding agents are token-hungry: each step re-sends files, diffs and tool output, so input tokens dominate. Models with a low input price and good tool use make agents dramatically cheaper.
Use a strong model for planning and a cheaper one for edits, test fixing and commit messages. Somnus works with any tool that accepts an OpenAI base URL, including Somnus's own desktop agent.
Cheap AI API for coding: price ranking
| # | Model | Maker | List (in / out) | Effective with Somnus |
|---|---|---|---|---|
| 1 | DeepSeek V4 Flash | DeepSeek | $0.22 / $0.66 | $0.11 / $0.33 |
| 2 | DeepSeek V4 Pro | DeepSeek | $0.66 / $1.98 | $0.33 / $0.99 |
| 3 | Claude Haiku 4.5 | Anthropic | $1 / $5 | $0.5 / $2.5 |
| 4 | GLM 5.3 | Zhipu | $1.4 / $4.4 | $0.7 / $2.2 |
| 5 | GPT-5.6 Luna | OpenAI | $1 / $6 | $0.5 / $3 |
| 6 | Qwen 3.8 Max | Alibaba | $1.65 / $4.95 | $0.83 / $2.48 |
| 7 | Claude Sonnet 5 | Anthropic | $2 / $10 | $1 / $5 |
| 8 | Kimi K3 | Moonshot | $3 / $15 | $1.5 / $7.5 |
Ranked by blended price (3 input : 1 output tokens).
Why Somnus for cheap ai api for coding
- Somnus buys model access in bulk and passes the saving on as extra credit.
- Pay-as-you-go. No monthly caps or throttling — spend your balance however you like.
- $5 free credit on sign-up, no card needed.
- Switch models by changing one string — same key, same balance.
Point the OpenAI SDK at Somnus
import OpenAI from "openai";
const client = new OpenAI({
apiKey: process.env.SOMNUS_API_KEY,
baseURL: "https://gateway-production-c837.up.railway.app/v1",
});
const resp = await client.chat.completions.create({
model: "claude-sonnet-5",
messages: [
{"role": "user", "content": "Cheap AI API for coding"}
],
});
console.log(resp.choices[0].message.content);Pick the model name from your dashboard.
| Claude Sonnet 5 | GPT-5.6 Sol | |
|---|---|---|
| Input / 1M | $2 | $5 |
| Output / 1M | $10 | $30 |
| This request | $0.0120 | $0.0340 |
| Blended / 1M (3:1) | $4.00 | $11.25 |
Claude Sonnet 5 is 2.8× cheaper for this request.
Questions
What is the cheap ai api for coding?
Among coding agents and code completion that burn lots of tokens, DeepSeek V4 Flash has the lowest list price on Somnus ($0.22 / $0.66), about $0.11 / $0.33 effective.
Is it really that cheap?
Yes: usage is charged at list price, and each $1 you top up becomes $2–$2.50 of credit.
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