Harness compatibility

Compare coding and agent harness support for Anthropic, OpenAI, and xAI models on Amazon Bedrock.

Claude Code

bedrock-runtime
bedrock-mantle
AWS SDK credential chain
Amazon Bedrock API key
Amazon Bedrock bearer token

Checked 2026-09-10Documentation

Codex

bedrock-runtime
bedrock-mantle
AWS SDK credential chain
Amazon Bedrock API key
Amazon Bedrock bearer token

Checked 2026-09-10Documentation

Grok Build

bedrock-runtime
bedrock-mantle
AWS SDK credential chain
Amazon Bedrock API key
Amazon Bedrock bearer token

Checked 2026-09-13Documentation

OpenCode

bedrock-runtime
bedrock-mantle
AWS SDK credential chain
Amazon Bedrock API key
Amazon Bedrock bearer token

Checked 2026-09-13Documentation

Pi

bedrock-runtime
bedrock-mantle
AWS SDK credential chain
Amazon Bedrock API key
Amazon Bedrock bearer token

Checked 2026-09-13Documentation

ScopeOnly direct, native Amazon Bedrock integrations and selected Anthropic, OpenAI, and xAI models are included; Mythos, Daybreak, GPT-OSS (including Safeguard), and GPT models before 5.4 are excluded, as are proxy paths. These are compatibility observations, not model or harness recommendations. Model capabilities remain documented separately in Capabilities; verify your deployment with the linked source and a local test.

27 models

Model	Claude Code	Codex	Grok Build	OpenCode	Pi
Claude Haiku 5.5
GPT-6.1 Sol
Claude Sonnet 5.5
Grok 4.7
Claude Opus 5.5
GPT-6 Luna
GPT-6 Sol
GPT-6 Astra
Claude Fable 5.1
Grok 4.6
Claude Opus 5
GPT-5.6 Luna
GPT-5.6 Sol
GPT-5.6 Terra
Claude Sonnet 5
Grok 4.3
Claude Fable 5
GPT-5.4
GPT-5.5
Claude Opus 4.8
Claude Opus 4.7
Claude Sonnet 4.6
Claude Opus 4.6
Claude Opus 4.5
Claude Haiku 4.5
Claude Sonnet 4
Claude 3 Haiku

Select a compatibility cell to inspect its connection and evidence.

✓ = verified, — = explicitly unsupported, ? = not tested or not yet recorded. Any unlisted combination is unknown, not unsupported.