Status line JSON reports wrong model after /model switch

Status Fixed / completed

Reported on v2.1.78

Maintainer reply ✓ Yes — ashwin-ant

Activity 4 comments · opened Mar 28, 2026 · closed Apr 18, 2026

💡 Likely answer: A maintainer (ashwin-ant, collaborator) responded on this thread — see the highlighted reply below.

Bug

After switching model via /model (e.g. selecting Opus 4.6), the status line JSON input still reports the previous model (Sonnet 4.6). The model.id and model.display_name fields in the JSON payload sent to the status line command do not reflect the currently selected model.

Steps to reproduce

Start Claude Code (defaults to Sonnet 4.6)
Run /model and select Opus 4.6
Observe status line still shows Sonnet 4.6

Debug output

Dumped the raw JSON received by the status line command to a file. Result:

{
  "model": {
    "id": "claude-sonnet-4-6",
    "display_name": "Sonnet 4.6"
  }
}

The conversation itself confirms Opus 4.6 is active (system prompt says claude-opus-4-6), but the status line JSON still reports Sonnet.

Expected behavior

model.id and model.display_name in the status line JSON should reflect the model currently in use after a /model switch.

Environment

Claude Code version: 2.1.78
OS: macOS (Darwin 25.2.0)
Shell: zsh

View original on GitHub ↗

4 Comments

Astro-Han · 6 months ago

Fixed in v2.1.85. I verified on 3/27 that after /model switch, the stdin JSON correctly reports the new model.id and display_name. Updating from 2.1.78 should resolve it.

yurukusa · 6 months ago

A UserPromptSubmit hook can track model switches and provide the correct model to statusline:

INPUT=$(cat)
PROMPT=$(echo "$INPUT" | jq -r '.user_prompt // empty' 2>/dev/null)
if echo "$PROMPT" | grep -qiE '^/model'; then
    touch "$HOME/.claude/.model-switched"
fi
if [ -f "$HOME/.claude/.model-switched" ]; then
    echo "{\"switched_at\":\"$(date -Iseconds)\"}" > "$HOME/.claude/.current-model"
    rm -f "$HOME/.claude/.model-switched"
fi
exit 0

INPUT=$(cat)
MODEL=$(echo "$INPUT" | jq -r '.model.display_name // "unknown"' 2>/dev/null)
TRACKED="$HOME/.claude/.current-model"
if [ -f "$TRACKED" ]; then
    SWITCHED=$(jq -r '.switched_at' "$TRACKED" 2>/dev/null)
    echo "$MODEL (switched: $SWITCHED)"
else
    echo "$MODEL"
fi

Note: this is a partial workaround — the real fix needs the status line JSON to reflect the actual current model after /model switches.

ashwin-ant collaborator · 6 months ago

This was fixed in v2.1.86 — The status line JSON now reports the correct model immediately after switching with /model. If you're still seeing this in the latest version, please comment with your version and repro and we'll reopen.

github-actions[bot] · 5 months ago

This issue has been automatically locked since it was closed and has not had any activity for 7 days. If you're experiencing a similar issue, please file a new issue and reference this one if it's relevant.