Tools2026-08-20 · source-backed

Claude Code 2.1.236 adds `ANTHROPIC_DEFAULT_MODEL`, which is not the same as `ANTHROPIC_MODEL`.

Issue

2026-08-20

Confidence

source-backed

Sources

Redaction

redacted

Story

The new variable sets the model new sessions start on while still letting a /model pick override and persist. The old one pins it. If you've been fighting your env var every time you want to switch models mid-session, this is the fix. (Claude Code changelog)

Claude Code uses MCP / Shared entity: Claude Code / Same source / Shared topic / Earlier coverage
Claude Code v2.1.203 and v2.1.204 target the unattended-run failure modes.
Linked by a graph relationship (Claude Code uses MCP); both cover Claude Code; cite the same source (Claude Code changelog).
Claude Code uses MCP / Shared entity: Claude Code / Same source / Shared topic / Earlier coverage / Tension
Pi's Four Tools Beat Claude Code on Databricks' Codebase
Linked by a graph relationship (Claude Code uses MCP); both cover Claude Code; cite the same source (Claude Code changelog).
Claude Code's doctor command now fixes problems itself
Linked by a graph relationship (Claude Code uses MCP); both cover Claude Code; cite the same source (Claude Code changelog).
Claude Code released SendMessage / Shared entity: Claude Code / Same source / Shared topic / Earlier coverage
Claude Code made forked subagents the default, and it changed both your bill and your isolation model
Linked by a graph relationship (Claude Code released SendMessage); both cover Claude Code; cite the same source (Claude Code changelog).
Claude Code sessions can now message each other and the 200-subagent cap is gone.
Linked by a graph relationship (Claude Code released SendMessage); both cover Claude Code; cite the same source (Claude Code changelog).
Anthropic released Claude Code / Shared entity: Claude Code / Same source / Shared topic / Earlier coverage
Anthropic patches four Claude Code containment bypasses
Linked by a graph relationship (Anthropic released Claude Code); both cover Claude Code; cite the same source (Claude Code changelog).
Claude Code criticizes Windows / Shared entity: Claude Code / Same source / Shared topic / Earlier coverage
The Agent Permission Layer Is the Attack Surface Now, and It's Made of String Parsing
Linked by a graph relationship (Claude Code criticizes Windows); both cover Claude Code; cite the same source (Claude Code changelog).
Claude Code uses Opus / Shared entity: Claude Code / Same source / Shared topic / Earlier coverage
Claude Code Stopped Auto-Running Its Review Skills
Linked by a graph relationship (Claude Code uses Opus); both cover Claude Code; cite the same source (Claude Code changelog).

Source trail

Claude Code changelog

Entities

Claude Code

Provenance

Canonical issue: Ramsay Research Agent — August 20, 2026
AI generated: no
Story unit: 2026-08-20-claude-code-2-1-236-adds-anthropic-default-model-which-is-not-the-same-as-anthropic-model
Labels: source-backed, canonical briefing excerpt

Fetching from the wire…

Claude Code 2.1.236 adds `ANTHROPIC_DEFAULT_MODEL`, which is not the same as `ANTHROPIC_MODEL`.

Story

Related stories

Claude Code v2.1.203 and v2.1.204 target the unattended-run failure modes.

Pi's Four Tools Beat Claude Code on Databricks' Codebase

Claude Code's doctor command now fixes problems itself

Claude Code made forked subagents the default, and it changed both your bill and your isolation model

Claude Code sessions can now message each other and the 200-subagent cap is gone.

Anthropic patches four Claude Code containment bypasses

The Agent Permission Layer Is the Attack Surface Now, and It's Made of String Parsing

Claude Code Stopped Auto-Running Its Review Skills

Source trail

Entities

Provenance

Claude Code 2.1.236 adds `ANTHROPIC_DEFAULT_MODEL`, which is not the same as `ANTHROPIC_MODEL`.

Story

Related stories

Claude Code v2.1.203 and v2.1.204 target the unattended-run failure modes.

Pi's Four Tools Beat Claude Code on Databricks' Codebase

Claude Code's doctor command now fixes problems itself

Claude Code made forked subagents the default, and it changed both your bill and your isolation model

Claude Code sessions can now message each other and the 200-subagent cap is gone.

Anthropic patches four Claude Code containment bypasses

The Agent Permission Layer Is the Attack Surface Now, and It's Made of String Parsing

Claude Code Stopped Auto-Running Its Review Skills

Source trail

Entities

Provenance