---
title: The cheapest LLM API for coding agents in 2026, ranked
description: Honest cost-per-1k-tokens comparison across OpenAI, Anthropic, Together, Fireworks, OpenRouter, and jusInfer for typical coding-agent workloads. Updated May 2026.
tldr: For coding agents, the cheapest LLM API is the one that picks a different model per call — typical blended cost is 60-80% less than always-Sonnet, with no quality regression. Direct providers (Anthropic, OpenAI) are most expensive per token. Cloudflare Workers AI is cheapest hosted. jusInfer auto-routes to the right tier for each step.
date: 2026-05-26
author: jusInfer
cluster: comparison
tags: cheapest-llm-api, cost-comparison, openrouter-alternative, coding-agents, inference-pricing
---

# The cheapest LLM API for coding agents in 2026, ranked

If you're running an AI coding agent — Claude Code, Cursor, Aider, OpenCode, Cline — your monthly bill is almost certainly bigger than it needs to be. The cheapest API for a chat is not the cheapest API for an agent, because agents make 5-20 calls per task with long contexts. This post compares actual per-task cost, not headline per-token rate, and tells you what to switch to.

## What "cheap" means for a coding agent

A typical agent task — *"refactor this function to use async/await and update the tests"* — generates roughly:

- 5,000–20,000 prompt tokens (source files + history)
- 500–3,000 completion tokens (diff + reasoning)
- 5–15 round trips (read file → propose edit → run tests → iterate)

That's 50k–250k tokens per task. At Sonnet 4.5 rates ($3 / 1M input, $15 / 1M output), a single task is $0.20–$1.20. Hundred tasks a day, you're at $20–$120/day per engineer. **The optimization isn't the per-token rate — it's routing the easy steps to a cheaper model.**

## The 2026 price grid (input / output, USD per 1M tokens)

| Provider | Top model | Mid model | Cheap model |
|---|---|---|---|
| Anthropic direct | Sonnet 4.5: $3 / $15 | Haiku 4.5: $1 / $5 | — |
| OpenAI direct | GPT-5: $5 / $20 | GPT-5-mini: $0.40 / $1.60 | GPT-5-nano: $0.05 / $0.40 |
| Together.ai | Llama 4 Maverick: $0.88 / $0.88 | Qwen3 Coder 480B: $0.90 / $1.20 | Llama 4 Scout 17B: $0.18 / $0.59 |
| Fireworks | Same as Together-ish | DeepSeek V4: $0.27 / $1.10 | Llama 4 8B: $0.10 / $0.30 |
| Cloudflare Workers AI | Kimi K2.6: $0.50 / $1.50 | Qwen3 8B: $0.10 / $0.20 | Llama 3.2 1B: $0.02 / $0.05 |
| OpenRouter | Aggregator — passes through + 5% | same | same |
| **jusInfer** | **Auto-routed — typical $0.20–$1.00 / 1M blended** | | |

*Prices as of May 2026. Verify on each provider's site before relying on these.*

## The honest ranking

### 1. Self-hosted Llama 4 8B on a single H100 — cheapest if your time is free
For batch overnight runs, this is unbeatable. For interactive coding agents, you're paying $2/hour for an idle GPU 90% of the time. Not realistic unless you're already an infra team.

### 2. Cloudflare Workers AI (`@cf/...` models) — cheapest hosted
$0.10–$0.50 / 1M tokens for the open-weights catalog. Edge-local, low latency. Smaller model selection. Coverage gaps for vision and very-long context.

### 3. Fireworks / Together — cheapest big-catalog hosting
Wide model selection, no minimums, fast. ~30-50% cheaper than Anthropic/OpenAI direct for equivalent capability via open weights.

### 4. OpenRouter — convenience tax
Same prices as the underlying provider + a small markup. Good if you want one bill across many providers and don't want to think about routing.

### 5. jusInfer — cheapest if you're running an *agent*
Same model menu, but **the system picks per call**. A read-only file inspection goes to an 8B model for $0.02. A multi-file refactor goes to Sonnet for $0.30. Average blended cost is 60–80% less than always-Sonnet, with the same task-completion rate. We benchmark this monthly on a fixed task suite.

### 6. Anthropic / OpenAI direct — most expensive per token, simplest to set up
Top-tier capability. If your agent only ever needs Sonnet or GPT-5 and the bill doesn't bother you, go direct.

## A real example

A team running Cursor with default Sonnet 4.5 settings, 8 engineers, 4 hours/day each, was spending ~$2,800/month. Switching the Cursor custom base URL to jusInfer (5 minutes of config), no other change, dropped them to ~$680/month over the next 30 days — same diff quality across their internal rubric. The savings came from jusInfer routing trivial completions (lint fixes, type annotations, single-line edits) to Qwen3 8B and reserving Sonnet for the hard cases.

We have a full case-study writeup with the methodology — email hello@jusinfer.com if you want a copy.

## Setup, by tool

- [Use jusInfer with Claude Code](/docs/claude-code/)
- [Use jusInfer with OpenCode](/docs/opencode/)
- [OpenAI-compatible drop-in (Cursor, Aider, Cline, Continue, Goose)](/docs/openai-drop-in/)

## Caveats and biases

- We're jusInfer. Our number is rosier than competitors'. That said, the methodology (50 fixed real-world tasks, evaluated by 3 senior engineers blind to provider) is in [our docs](/docs/api-reference/) and you can reproduce it with our trial credits.
- Prices change monthly. Anything written here is stale within 90 days. Check primary sources.
- "Cheapest" for coding is not "cheapest" for chat, not "cheapest" for RAG, not "cheapest" for vision. Read your own logs before picking.

## Related reading

- [OpenRouter alternatives in 2026](/blog/openrouter-alternatives-2026/)
- [What is an inference endpoint?](/blog/what-is-an-inference-endpoint/)
- [Why your Cursor bill is too high — and three ways to cut it](/blog/cursor-too-expensive-options/)
- [API reference](/docs/api-reference/)

---

*Raw markdown: [/blog/cheapest-llm-api-for-coding-2026.md](/blog/cheapest-llm-api-for-coding-2026.md)*