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Add GPT-5.4 support #454

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docs: add GPT-5.4 support in codex and opencode documentation
tembo[bot] Mar 5, 2026
6785c94
docs(coding-agents): remove unnecessary model key usage instruction f…
tembo[bot] Mar 5, 2026
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10 changes: 10 additions & 0 deletions changelog.mdx
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Expand Up @@ -4,6 +4,16 @@ description: "Keep track of changes and updates to Tembo"
icon: "clock-rotate-left"
---

<Update label="2026-03-05">

## GPT-5.4 model support

`gpt-5.4` is now available as a model option in both Codex and OpenCode.

Various bug fixes and improvements :)

</Update>

<Update label="2026-02-27">

## GPT-5.3 Codex model support
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12 changes: 6 additions & 6 deletions features/coding-agents.mdx
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Expand Up @@ -10,8 +10,6 @@ Tembo supports multiple coding agents to solve your software engineering tasks.

## Supported LLMs

Use these model IDs with your agent key (`agent:model` or `agent:model:reasoningLevel` for GPT-5 variants). Choose a model from a provider your agent supports and make sure any required API keys are configured.

**Anthropic (no API key required)**
- `claude-opus-4-6`
- `claude-sonnet-4-6`
Expand All @@ -20,6 +18,7 @@ Use these model IDs with your agent key (`agent:model` or `agent:model:reasoning
- `claude-4-5-haiku`

**OpenAI (API key required)**
- `gpt-5.4` (available in both Codex and Opencode)
- `gpt-5.3-codex`
- `gpt-5.2` (default for Codex)
- `gpt-5.2-codex`, `gpt-5.2-codex-high`
Expand Down Expand Up @@ -52,8 +51,8 @@ For GPT-5 and GPT-5.2 families you can append a reasoning effort (`:minimal`, `:
<CodingAgentsTable />

- **Claude Code** — Anthropic's Claude models. Best balance of quality, reliability, and cost.
- **Codex** — OpenAI's GPT-5 family with configurable reasoning effort (`:minimal`, `:low`, `:medium`, `:high`).
- **Opencode** — Multi-provider support: Anthropic, OpenAI, and OSS models.
- **Codex** — OpenAI's GPT-5 family, including `gpt-5.4`, with configurable reasoning effort (`:minimal`, `:low`, `:medium`, `:high`).
- **Opencode** — Multi-provider support: Anthropic, OpenAI, and OSS models, including `gpt-5.4`.
- **Amp** — Claude-powered with automatic model selection.
- **Cursor** — Multi-provider via Cursor CLI: Claude, GPT, Gemini, Composer, and Grok.

Expand All @@ -63,7 +62,8 @@ Use the format `agentType:model[:reasoningLevel]`:

```
claudeCode:claude-opus-4-5
codex:gpt-5.2:high
codex:gpt-5.4:high
opencode:gpt-5.4
cursor:grok
```

Expand All @@ -73,7 +73,7 @@ Default: `claudeCode:claude-opus-4-6`

| Use Case | Recommended Models |
|----------|-------------------|
| Most tasks | `claude-4-5-sonnet`, `gpt-5.2` |
| Most tasks | `claude-4-5-sonnet`, `gpt-5.4` |
| Quick fixes | `claude-4-5-haiku`, `gpt-5.1-codex-mini` |
| Complex refactoring | `claude-opus-4-5`, `gpt-5.1-codex-max` |

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2 changes: 1 addition & 1 deletion integrations/slack.mdx
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Expand Up @@ -79,7 +79,7 @@ Tembo supports flexible command syntax with multiple options. You can use either
- Example: `@tembo [repo=myorg/webapp,myorg/api] Add authentication to both frontend and backend`

- **`agent=`** - Specify which coding agent and model to use (format: `agentType:model`)
- Example: `agent=claudeCode:claude-opus-4-5`, `agent=codex:gpt-5.2`
- Example: `agent=claudeCode:claude-opus-4-5`, `agent=codex:gpt-5.4`, `agent=opencode:gpt-5.4`
- Supported coding agents: `claudeCode`, `codex`, `opencode`, `amp`, `cursor`
- If no coding agent is specified, Tembo uses your organization's default configuration
- See [Coding Agents documentation](/features/coding-agents) for all available options
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