13 pages for anthropic_default_haiku_model.

Manage multiple agents with agent view Claude Code CLI · in the page agent-view …configured, the request uses the session's main model instead; set [`ANTHROPIC_DEFAULT_HAIKU_MODEL`](/docs/en/model-config#environment-variables) to choose one. ### Pull request status When a sessi… Claude Code on Amazon Bedrock Claude Code CLI · in the page amazon-bedrock …/fast model (Bedrock and Mantle). # On Bedrock, has no effect without ANTHROPIC_DEFAULT_HAIKU_MODEL # or the deprecated ANTHROPIC_SMALL_FAST_MODEL set. export ANTHROPIC_SMALL_FAST_MODEL_AWS_REGION=us-… Claude Code changelog Claude Code CLI · in the page changelog …xed `/model` picker showing a hardcoded Haiku version and price when `ANTHROPIC_DEFAULT_HAIKU_MODEL` pins a different model * Fixed dynamic workflows started during a model fallback running every agen… Claude Code on Claude Platform on AWS Claude Code CLI · in the page claude-platform-on-aws …opus-4-8 export ANTHROPIC_DEFAULT_SONNET_MODEL=claude-sonnet-5 export ANTHROPIC_DEFAULT_HAIKU_MODEL=claude-haiku-4-5 ``` For the full list of model IDs and aliases, see [Models overview](https://plat… Environment variables Claude Code CLI · in the page env-vars …| | `ANTHROPIC_DEFAULT_HAIKU_MODEL` | Model ID that the `haiku` alias resolves to, also used for [background fu… Keep Claude working toward a goal Claude Code CLI · in the page goal …## Evaluation model and cost To evaluate on a different model, set [`ANTHROPIC_DEFAULT_HAIKU_MODEL`](/docs/en/model-config#environment-variables). > [!WARNING] > > Claude Code reads `ANTHROPIC_DEFAU… Claude Code on Google Cloud's Agent Platform Claude Code CLI · in the page google-vertex-ai …s-4-8' export ANTHROPIC_DEFAULT_SONNET_MODEL='claude-sonnet-5' export ANTHROPIC_DEFAULT_HAIKU_MODEL='claude-haiku-4-5@20251001' ``` For current and legacy model IDs, see [Models overview](https://pla… Connect Claude Code to an LLM gateway Claude Code CLI · in the page llm-gateway-connect …ANTHROPIC_DEFAULT_OPUS_MODEL`, `ANTHROPIC_DEFAULT_SONNET_MODEL`, and `ANTHROPIC_DEFAULT_HAIKU_MODEL` as in [Pin model versions](/docs/en/google-vertex-ai#5-pin-model-versions). Setting `ANTHROPIC_DEFA… Claude Code gateway compatibility guide Claude Code CLI · in the page llm-gateway-protocol …for [background tasks](/docs/en/costs#background-token-usage) unless `ANTHROPIC_DEFAULT_HAIKU_MODEL` pins one | The default Sonnet model, or the main model once one is selected, as the [Amazon Bedrock… Roll out an LLM gateway for your organization Claude Code CLI · in the page llm-gateway-rollout …e two variables matches your configuration | | `ANTHROPIC_MODEL` or [`ANTHROPIC_DEFAULT_HAIKU_MODEL`](/docs/en/model-config) | Set which model name Claude Code requests for the main session and for ba… Claude Code on Microsoft Foundry Claude Code CLI · in the page microsoft-foundry …s-4-8' export ANTHROPIC_DEFAULT_SONNET_MODEL='claude-sonnet-5' export ANTHROPIC_DEFAULT_HAIKU_MODEL='claude-haiku-4-5' ``` Background tasks such as session title generation use the small/fast model,… Model configuration Claude Code CLI · in the page model-config …he `ANTHROPIC_DEFAULT_OPUS_MODEL`, `ANTHROPIC_DEFAULT_SONNET_MODEL`, `ANTHROPIC_DEFAULT_HAIKU_MODEL`, and `ANTHROPIC_DEFAULT_FABLE_MODEL` environment variables cannot redirect an allowed alias to a mo… Enterprise deployment overview Claude Code CLI · in the page third-party-integrations …ANTHROPIC_DEFAULT_OPUS_MODEL`, `ANTHROPIC_DEFAULT_SONNET_MODEL`, and `ANTHROPIC_DEFAULT_HAIKU_MODEL`. Without pinning, model aliases resolve to Claude Code's built-in default for that provider, which…