Which AI model do coding agents use most?

How much of coding agent spend goes to Claude? In April 2026, Claude models power 79% to 100% of spend across all nine coding agents observed through the Requesty gateway. Claude Code is nearly 100% locked to Claude (expected, as Anthropic's own product). Zed is the most model-diverse at 59% Claude / 41% OpenAI. OpenCode has the highest non-Claude adoption among open-source agents at 13% OpenAI. The near-total consolidation to Claude occurred organically across agents whose users freely choose their backend model. This is a revealed preference: when developers can pick any model for coding tasks, they overwhelmingly choose Claude. Gemini's share has declined from 34% (May 2025 via Cline) to under 6% across all agents, despite competitive pricing.

What percentage of coding agent spend goes to Claude?

How much of coding agent spend goes to Claude? In April 2026, Claude models power 79% to 100% of spend across all nine coding agents observed through the Requesty gateway. Claude Code is nearly 100% locked to Claude (expected, as Anthropic's own product). Zed is the most model-diverse at 59% Claude / 41% OpenAI. OpenCode has the highest non-Claude adoption among open-source agents at 13% OpenAI. The near-total consolidation to Claude occurred organically across agents whose users freely choose their backend model. This is a revealed preference: when developers can pick any model for coding tasks, they overwhelmingly choose Claude. Gemini's share has declined from 34% (May 2025 via Cline) to under 6% across all agents, despite competitive pricing.

Do coding agent users prefer Claude over GPT for coding?

How much of coding agent spend goes to Claude? In April 2026, Claude models power 79% to 100% of spend across all nine coding agents observed through the Requesty gateway. Claude Code is nearly 100% locked to Claude (expected, as Anthropic's own product). Zed is the most model-diverse at 59% Claude / 41% OpenAI. OpenCode has the highest non-Claude adoption among open-source agents at 13% OpenAI. The near-total consolidation to Claude occurred organically across agents whose users freely choose their backend model. This is a revealed preference: when developers can pick any model for coding tasks, they overwhelmingly choose Claude. Gemini's share has declined from 34% (May 2025 via Cline) to under 6% across all agents, despite competitive pricing.

Which coding agent has the most model diversity?

How much of coding agent spend goes to Claude? In April 2026, Claude models power 79% to 100% of spend across all nine coding agents observed through the Requesty gateway. Claude Code is nearly 100% locked to Claude (expected, as Anthropic's own product). Zed is the most model-diverse at 59% Claude / 41% OpenAI. OpenCode has the highest non-Claude adoption among open-source agents at 13% OpenAI. The near-total consolidation to Claude occurred organically across agents whose users freely choose their backend model. This is a revealed preference: when developers can pick any model for coding tasks, they overwhelmingly choose Claude. Gemini's share has declined from 34% (May 2025 via Cline) to under 6% across all agents, despite competitive pricing.

Why is Claude so dominant in AI coding tools?

How much of coding agent spend goes to Claude? In April 2026, Claude models power 79% to 100% of spend across all nine coding agents observed through the Requesty gateway. Claude Code is nearly 100% locked to Claude (expected, as Anthropic's own product). Zed is the most model-diverse at 59% Claude / 41% OpenAI. OpenCode has the highest non-Claude adoption among open-source agents at 13% OpenAI. The near-total consolidation to Claude occurred organically across agents whose users freely choose their backend model. This is a revealed preference: when developers can pick any model for coding tasks, they overwhelmingly choose Claude. Gemini's share has declined from 34% (May 2025 via Cline) to under 6% across all agents, despite competitive pricing.

Data/Agentic workloads/Apr 2026

Claude model share by coding agent, April 2026

Name: Claude model share by coding agent, April 2026
Creator: Requesty
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Agentic workloads, LLM, gateway, provider, metrics, Which AI model do coding agents use most?, What percentage of coding agent spend goes to Claude?, Do coding agent users prefer Claude over GPT for coding?, Which coding agent has the most model diversity?, Why is Claude so dominant in AI coding tools?

How much of coding agent spend goes to Claude? In April 2026, Claude models power 79% to 100% of spend across all nine coding agents observed through the Requesty gateway. Claude Code is nearly 100% locked to Claude (expected, as Anthropic's own product). Zed is the most model-diverse at 59% Claude / 41% OpenAI. OpenCode has the highest non-Claude adoption among open-source agents at 13% OpenAI.

Why it mattersThe near-total consolidation to Claude occurred organically across agents whose users freely choose their backend model. This is a revealed preference: when developers can pick any model for coding tasks, they overwhelmingly choose Claude. Gemini's share has declined from 34% (May 2025 via Cline) to under 6% across all agents, despite competitive pricing.

Period

Apr 2026

Updated

May 16, 2026

ID

coding-agent-model-apr26

§ 01

Key findings

01Claude Code: 99.5% Claude. Expected, as it is Anthropic's first-party tool.
02Roo Code: 92% Claude. Open-source, model-agnostic, yet users overwhelmingly choose Claude.
03OpenCode: 79% Claude, 13% OpenAI. The most experimental open-source user base.
04Zed: 59% Claude, 41% OpenAI. The most model-diverse agent overall.
05Gemini share is below 6% across all agents despite competitive pricing.

§ 02

Data

Agent	Claude share(percent)
Claude Code	99.50%
Forge	99.50%
Kilo Code	93.70%
Roo Code	91.70%
Cline	89.00%
OpenCode	79.00%
Aider	78.20%
Zed	59.00%

§ 03

Cite as

APA

Click to copy

BibTeX

Click to copy

ID: coding-agent-model-apr26·Updated May 16, 2026·Period Apr 2026