Cafiyn Pulse
Cost Comparator · Code assistant

What does an AI code assistant cost per developer per month?

Coding workloads send more tokens per call than almost any other use case. Context window, not call count, drives the bill.

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Code-assistant workloads look different from every other category on this page: call frequency is high (tens of calls per developer per day) and each call carries a large context window, often 3,000 to 8,000 input tokens once you include surrounding file context, imports, and recent conversation history. That combination of high frequency and large payload makes code assistants one of the more expensive per-seat AI workloads to run internally.

The other factor unique to this workload is that output quality genuinely correlates with model tier more than in most categories, a cheap model producing subtly wrong code costs more in developer time than it saves in API spend, so this is usually not the workload to aggressively downgrade.

Who runs this workload
  • Internal engineering tools building an in-IDE or in-repo AI assistant
  • Products offering AI code review, PR summarization, or test generation
  • Dev-tool companies pricing an AI feature into their own subscription
Cost drivers

What actually moves the bill.

Context window per call

Including surrounding file context and history routinely pushes input tokens to 3,000 to 8,000 per call, several times a typical chat message.

Calls per developer per day

Active users of a coding assistant call it far more often than a typical chatbot, 20 to 50+ times a day is common for an IDE-integrated tool.

Model tier for correctness

This is one workload where the premium model tier is usually worth the added cost, since a wrong suggestion costs developer time to catch.

FAQ

Common questions.

What does an AI coding assistant cost per developer per month?

For a developer making roughly 40 calls a day with 4,000-token average context using a premium model like Claude Sonnet 5 or GPT-4.1, expect $15 to $60 per developer per month in raw API cost, before any margin if you are reselling the feature.

Is it worth using a cheaper model for a code assistant?

Usually not as the default. Coding is one of the few workloads where model quality directly affects correctness, and a wrong suggestion costs more in developer time than the API savings. Reserve cheap models for low-stakes tasks like commit message generation, not code generation itself.

How do I control context window costs in a code assistant?

Truncate to only the relevant file and its direct imports rather than the whole repo, and cache unchanged context (like a style guide or repo conventions) instead of resending it on every call.

Other workloads

See a different shape of AI product.

Chatbot / support assistant
Support bots and product assistants are the most common AI workload, and the easiest to under-budget. Here is the real math.
Voice agent
Voice is three billed legs per turn: transcription, the model, and speech synthesis. Most estimates only price one of them.
Image generation
Per-image pricing looks trivial until you multiply it by users who generate more than once.
RAG / knowledge assistant
Retrieved context is the hidden cost driver in RAG. It is paid as input tokens on every single query.
Multi-modal app
Text, voice, and image each have their own pricing unit. A multi-modal product pays all of them per user, per day.
Per-model pricing

What each model costs for this workload.

Claude Sonnet 5 pricing
Anthropic's mid-tier flagship. Here is what it actually costs per token, and what that means for a real monthly bill.
GPT-6 Astra pricing
OpenAI's flagship at $10 and $50 per million tokens. Two and a half times GPT-5.6 Sol, and eight times GPT-5.
Grok 4.6 pricing
$2 and $6 per million tokens, which undercuts most of the mid tier. Both rates double above 200k tokens.
All model pricing
One table, every provider, per million tokens.
Price change log
Every change we verify, including increases already scheduled.

Open the tool.

Live math against your own usage numbers, verified monthly against provider pricing pages.

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