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AI Coding Agent Cost Calculator
GitHub Copilot, Cursor, Claude Code, and OpenAI Codex all advertise a $10-20/month headline price - but daily agentic use routinely bills far more once metered credits, usage pools, and rate windows kick in. This calculator uses verified July 2026 vendor pricing plus real July 2026 billing-shock reports to estimate what you'll actually pay.
Quick answer
For a solo developer in July 2026: GitHub Copilot Pro is a flat $10/mo for light use, but daily agentic use can add roughly $0-15/mo in metered AI Credit overage on top. Cursor Pro is $20/mo, but its usage-based pool has pushed daily users to an estimated $25-60/mo, and heavy agentic sessions have driven some Pro+ users' bills up by an estimated $50-300/mo in extra charges. Claude Code runs on the $20/mo Claude Pro plan (or $100-200/mo on Max 5x/20x for heavy agentic work) with no published overage - you're either inside the 5-hour window or you're not. OpenAI Codex is $20/mo on Plus for daily use, or $100-200/mo on Pro 5x/20x for heavy agentic sessions, also with no paid overage option.
Bottom line: the $10-20/month headline price is realistic only for light, autocomplete-style use. Heavy agentic workflows - long unattended coding sessions, multi-file refactors, cloud agents running in the background - can push any of these tools to $100-300+ per developer per month. Use the calculator below for your own team size and usage level.
There's also a fourth path a lot of developers skip entirely: skip the subscription and bring your own API key from Kimi, DeepSeek, Grok, Qwen, GLM, Mistral, OpenAI, Gemini or Claude straight into an open-source agent like Cline, Roo Code, OpenCode, or Aider. See the Bring your own API key section below for what that actually costs per month.
Calculate your monthly cost
Tools
Usage intensity
Overage estimates derive from vendor billing mechanics and July 2026 user reports - not vendor quotes. Figures marked est. are estimates.
Bring your own API key - Cline, Roo Code, OpenCode, Aider
A subscription isn't the only way to code with AI. A growing share of developers skip Copilot/Cursor/Claude Code plans entirely and plug a raw API key from Kimi, Grok, DeepSeek, Qwen, GLM, Mistral, OpenAI, Gemini or Claude straight into an open-source agent - Cline, Roo Code, OpenCode, or Aider - paying per token instead of a flat monthly fee. Here's what that actually costs per month, based on verified July 2026 per-token pricing.
Models
Uses the same team size and intensity you set above.
Ranges ignore prompt caching - with caching on, real bills are often 30-60% lower, so treat these as a conservative ceiling. Agentic coding is also heavily input-skewed (roughly 20-25 input tokens per output token), which is why input volume dominates the estimate. Figures marked est. are estimates.
Confidence: light and heavy-agentic ranges are rough, low-confidence estimates; daily-driver estimates are medium confidence.
The third option: GLM Coding Plan
GLM Coding Plan - Lite costs $18/month (promo pricing sometimes runs closer to $12.60) for roughly 80 prompts per 5-hour window, about 400/week - and it's the exception on this page: it's an official subscription that plugs in as the backend for Claude Code, Cline, and OpenCode, not a raw per-token API key. It sits in a hybrid zone between a flat subscription and BYO-API, and most developers coding on API keys have never heard of it. The old viral $3/month GLM plan died on 2026-02-11 - don't go looking for it.
Official price list - July 2026
Tool names link to the official vendor pricing page used to verify each row. Rows marked estimated are low-confidence per vendor disclosure gaps.
| Tool | Plan | Price | What's included |
|---|
What changed in 2026
- Apr 30 - May 29Amazon Q Developer sunset: end-of-support announced Apr 30, new signups blocked May 15, newest Claude models became Kiro-exclusive May 29. AWS's successor product is Kiro.
- May 15 - Aug 15xAI retires grok-code-fast-1: requests silently redirect to grok-build-0.1 at different pricing starting May 15, 2026, with full shutdown Aug 15, 2026 - a hardcoded old model name in Cline/Roo configs keeps billing, just at a different rate.
- Jun 1, 2026GitHub Copilot switches from counting "premium requests" to token-metered GitHub AI Credits - the billing unit changes for every paid tier.
- Jun 2, 2026Windsurf is rebranded to Devin Desktop; its standalone pricing page is gone and windsurf.com/pricing now 308-redirects to devin.ai/pricing.
- Jun 16 - Jul 4Cursor billing-shock wave: usage-based overage on the $20 Pro plan produces a spike of shocking bills; Cursor issues a public apology and refunds for the window.
- Jul 24, 2026DeepSeek retires the deepseek-chat/deepseek-reasoner aliases - BYO-API users on Cline/Roo/Aider need to move to deepseek-v4-flash or deepseek-v4-pro before the cutover.
Where vendors hide the ball
Reported bill shocks (June-July 2026)
Cursor
A $28/month plan turned into roughly $500 in three days once usage-based billing kicked in, sparking an r/cursor backlash. Cursor issued a public apology around July 4, 2026 and refunded charges for the June 16 - July 4 window.
Read the accountGitHub Copilot
"Watching months of credits vanish in a single day" - a single agentic VS Code session burned most of a month's Pro credit allowance shortly after the June 1, 2026 switch to token-metered AI Credits, prompting a formal community complaint (#198080).
Read the reportDevin
The $20/month headline price routinely becomes $100-300+/month in real spend once ACU (agent compute unit) billing kicks in - one widely shared example: 3,750 ACU-minutes worked out to 62.5 hours at roughly $8/hour.
Read the threadFAQ
Is Copilot still $10?
Yes - GitHub Copilot Pro is still $10/month for individuals. What changed is what that $10 buys: since June 1, 2026 GitHub replaced premium-request counting with token-metered 'GitHub AI Credits,' so heavy agentic use inside that $10 plan can burn through the included $15/month credit allowance faster than the old system did.
Why did my Cursor bill explode?
Cursor's $20 Pro plan includes a pooled usage credit, but once you exceed it, extra usage bills at usage-based rates with no flat overage price published. Between June 16 and July 4, 2026 this produced a wave of billing-shock complaints - including one widely shared case of a $28/month plan turning into roughly $500 in three days - before Cursor issued a public apology and refunds for that window.
Is Claude Code unlimited?
No. Claude Code shares one usage pool with Claude chat on your Pro or Max plan, gated by a rolling 5-hour window and a weekly cap. Anthropic does not publish the exact number of prompts or tokens included - only that Max plans give roughly 5x or 20x the Pro allowance.
What happened to Windsurf?
Cognition acquired Windsurf in December 2025. On March 19, 2026 its Pro plan rose from $15 to $20 and quotas were replaced with credits; on June 2, 2026 Windsurf was rebranded to Devin Desktop and windsurf.com/pricing now redirects to devin.ai/pricing. The Windsurf brand no longer has an independent price.
Which is cheapest for a team of 5?
Use the calculator above with Team size set to 5 - it recalculates live for whichever tools and usage intensity you pick. As a rule of thumb: for light, autocomplete-heavy teams GitHub Copilot Pro at $10/seat is usually the cheapest headline price; for daily agentic use, expect Cursor Pro, Claude Pro, or Codex Plus to land in a similar $20/seat range before overage.
Is Amazon Q Developer still an option?
Only if you already have an active subscription. AWS announced end-of-support on April 30, 2026 and blocked new Free and Pro signups on May 15, 2026. The newest Claude models are now Kiro-exclusive, and Kiro is AWS's official successor product.
Is Kimi or DeepSeek cheaper than a Claude Code subscription?
It depends on the model and how heavy your usage is. For daily-driver use, our token estimates put deepseek-v4-flash at roughly $3-7/month and GLM-4.7 at roughly $14-31/month - both cheaper than the Claude Pro subscription's flat $20/month, though Claude Pro has no metered overage on top of that flat fee. Pricier coding-tuned models like Kimi K2.7 Code (roughly $23-51/month) or gpt-5.3-codex (roughly $49-107/month) can land at or well above a flat subscription once usage climbs toward the heavy-agentic end of the range - so "cheaper" is model-and-usage dependent, not a blanket yes.
Can I use these models with Cline or Aider?
Yes - Cline, Roo Code, OpenCode, and Aider all accept an OpenAI-compatible or vendor-native API key, including Kimi, DeepSeek, Qwen, GLM, Mistral, xAI Grok, Gemini, and Claude. The one catch: some vendor subscriptions (Kimi's paid membership tiers, SuperGrok) are separate credit pools that do not work as an API key for these tools - you need a dedicated API key from the vendor's developer/platform console, not your consumer app login.
What is the GLM Coding Plan?
The GLM Coding Plan from Zhipu/z.ai is a flat-rate subscription - $18/month for the Lite tier, with promo pricing sometimes closer to $12.60 - that officially plugs into Claude Code, Cline, and OpenCode as a backend, giving roughly 80 prompts per 5-hour window (about 400/week). It's a hybrid between a subscription and a raw API key, and unlike the old viral $3/month GLM plan (killed February 11, 2026), it's the current, supported budget option for subscription-style access to GLM's coding models.
Sources
Prices verified 2026-07-17 against official vendor pages. Estimates, not quotes.