Models

All frontier coding models from OpenAI, Anthropic, Google, and more

Available Models

Below is a list of all available models. Models are categorized by type:

• Frontier: Best coding agent models
• General: Cheaper but less intelligent models

ID	Name	Type	Limit
claude-opus-4-20250514	Claude Opus 4	Frontier	200K
claude-opus-4-1-20250805	Claude Opus 4.1	Frontier	200K
claude-opus-4-5	Claude Opus 4.5	Frontier	200K
gpt-5-pro	GPT-5 Pro	Frontier	400K
claude-haiku-4-5-20251001	Claude Haiku 4.5	Frontier	200K
claude-sonnet-4-20250514	Claude Sonnet 4	Frontier	200K
claude-sonnet-4-1m	Claude Sonnet 4 (1M)	Frontier	1.0M
claude-sonnet-4-5-20250929	Claude Sonnet 4.5	Frontier	200K
claude-sonnet-4-5-1m	Claude Sonnet 4.5 (1M)	Frontier	1.0M
zai-glm-4.6	GLM 4.6	Frontier	131K
gpt-5	GPT-5	Frontier	400K
gpt-5-high	GPT-5 (High Reasoning)	Frontier	400K
gpt-5-high-fast	GPT-5 (High Reasoning, Priority)	Frontier	400K
gpt-5-low	GPT-5 (Low Reasoning)	Frontier	400K
gpt-5-low-fast	GPT-5 (Low Reasoning, Priority)	Frontier	400K
gpt-5-fast	GPT-5 (Priority)	Frontier	400K
gpt-5-codex	GPT-5 Codex	Frontier	400K
gpt-5-codex-high	GPT-5 Codex (High Reasoning)	Frontier	400K
gpt-5-codex-low	GPT-5 Codex (Low Reasoning)	Frontier	400K
gpt-5.1	GPT-5.1	Frontier	400K
gpt-5.1-high	GPT-5.1 (High Reasoning)	Frontier	400K
gpt-5.1-high-fast	GPT-5.1 (High Reasoning, Priority)	Frontier	400K
gpt-5.1-low	GPT-5.1 (Low Reasoning)	Frontier	400K
gpt-5.1-low-fast	GPT-5.1 (Low Reasoning, Priority)	Frontier	400K
gpt-5.1-fast	GPT-5.1 (Priority)	Frontier	400K
gpt-5.1-codex	GPT-5.1 Codex	Frontier	400K
gpt-5.1-codex-high	GPT-5.1 Codex (High Reasoning)	Frontier	400K
gpt-5.1-codex-low	GPT-5.1 Codex (Low Reasoning)	Frontier	400K
gemini-3-pro-preview	Gemini 3 Pro Preview	Frontier	200K
claude-3.5-sonnet	Claude-3.5 Sonnet	General	200K
claude-3.7-sonnet	Claude-3.7 Sonnet	General	200K
deepseekr1	Deepseek r1	General	164K
deepseekv3	Deepseek v3	General	128K
gpt-4.1	GPT-4.1	General	1.0M
gpt-4o	GPT-4o	General	128K
gpt-5-mini	GPT-5-mini	General	400K
gpt-oss-120b	GPT-OSS-120b	General	131K
gemini-2.5-pro	Gemini 2.5 Pro	General	1.0M
grok-4	Grok 4	General	256K
grok-4-fast	Grok 4 Fast	General	2.0M
grok-code-fast-1	Grok Code Fast 1	General	256K
grok-3	Grok-3	General	131K
o3	OpenAI-o3	General	200K
o3-mini	OpenAI-o3-mini	General	200K
o4-mini	OpenAI-o4-mini	General	200K

Models Picker

You can see what model you are currently using by clicking the dropdown at the bottom left of the chat interface:

Models can misreport their name/version at runtime. Rely on the model ID you selected in Firebender, not the model’s self-identification response.

Example: Deepseek v3 misidentifies itself as gpt-4

Context Windows

A context window is the maximum span of tokens (text and code) a model can consider at once. The more prompts, files, and responses in a session, the more context is consumed.

If you run into context window limit, its recommended to summarize or start a new chat.

Avoiding Window Limits

• prune chats frequently if the coding agent does something wrong (instead of telling the agent to undo its changes, restart the prompt with approaches to avoid)
• scope down changes that can be easily verifiable (e.g. running tests, reviewing UI change, etc.)

You can monitor how close you are to the context limit at the bottom of each chat:

Default Mode

Default Mode automatically selects the best model for each task based on request complexity and availability. When a rate limit is hit, Firebender automatically switches to the next best model.

Controls

You can specify models using one of the following methods:

• Deep Links: jetbrains://idea/firebender/chat?model=claude-sonnet-4-20250514
• Commands: Configure in firebender.json with "model": "claude-sonnet-4-20250514"
• Plugin Interface: Select from the model dropdown in the Firebender chat interface

Restrict models for your team

Organizations can configure which models are available to team members. Learn more about Business organizations.