[BUG] Model opusplan still using 200K context for either mode
Status Closed — not planned
Reported on v2.1.76
Maintainer reply None cached
Workaround ✓ Mentioned in thread ↓
Activity 7 comments · opened Mar 14, 2026 · closed Apr 14, 2026
Preflight Checklist
- [x] I have searched existing issues and this hasn't been reported yet
- [x] This is a single bug report (please file separate reports for different bugs)
- [x] I am using the latest version of Claude Code
What's Wrong?
I'm on latest version of CC
current: 2.1.76 · latest: 2.1.76I'm using /model opusplan, which is to use Opus 4.6 for plan mode, Sonnet 4.6 for other usage, but I'm still seeing 200K context size for either mode/model. Please update to give me the full 1M as I'm expecting, after https://claude.com/blog/1m-context-ga
What Should Happen?
I'm expecting the max context available to be 1M after this change for Max plan users like I am https://claude.com/blog/1m-context-ga
Error Messages/Logs
Steps to Reproduce
❯ /model
─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
Select model
Switch between Claude models. Applies to this session and future Claude Code sessions. For other/previous model names, specify with --model.
1. Default (recommended)Opus 4.6 with 1M context [NEW] · Most capable for complex work
2. SonnetSonnet 4.6 · Best for everyday tasks
3. HaikuHaiku 4.5 · Fastest for quick answers
❯ 4. Opus Plan Mode ✔Use Opus 4.6 in plan mode, Sonnet 4.6 otherwisePlan mode:
❯ /context
⎿Context Usage
⛁ ⛁ ⛁ ⛁ ⛁ ⛁ ⛁ ⛀ ⛁ ⛁claude-opus-4-6 · 27k/200k tokens (14%)
⛁ ⛁ ⛁ ⛁ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶
⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶Estimated usage by category
⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶⛁ System prompt: 5.4k tokens (2.7%)
⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶⛁ System tools: 7.9k tokens (4.0%)
⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶⛁ Custom agents: 808 tokens (0.4%)
⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶⛁ Memory files: 2.4k tokens (1.2%)
⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶⛁ Skills: 2.1k tokens (1.0%)
⛶ ⛶ ⛶ ⛝ ⛝ ⛝ ⛝ ⛝ ⛝ ⛝⛁ Messages: 8.9k tokens (4.4%)
⛝ ⛝ ⛝ ⛝ ⛝ ⛝ ⛝ ⛝ ⛝ ⛝⛶ Free space: 140k (69.8%)
⛝ Autocompact buffer: 33k tokens (16.5%)Non-plan mode:
❯ /context
⎿Context Usage
⛁ ⛁ ⛁ ⛁ ⛁ ⛁ ⛁ ⛀ ⛁ ⛁claude-sonnet-4-6 · 29k/200k tokens (15%)
⛁ ⛁ ⛁ ⛁ ⛁ ⛶ ⛶ ⛶ ⛶ ⛶
⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶Estimated usage by category
⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶⛁ System prompt: 5.4k tokens (2.7%)
⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶⛁ System tools: 7.9k tokens (4.0%)
⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶⛁ Custom agents: 808 tokens (0.4%)
⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶⛁ Memory files: 2.4k tokens (1.2%)
⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶ ⛶⛁ Skills: 2.1k tokens (1.0%)
⛶ ⛶ ⛶ ⛝ ⛝ ⛝ ⛝ ⛝ ⛝ ⛝⛁ Messages: 10.9k tokens (5.4%)
⛝ ⛝ ⛝ ⛝ ⛝ ⛝ ⛝ ⛝ ⛝ ⛝⛶ Free space: 138k (68.8%)
⛝ Autocompact buffer: 33k tokens (16.5%)Claude Model
Not sure / Multiple models
Is this a regression?
I don't know
Last Working Version
_No response_
Claude Code Version
2.1.76
Platform
Anthropic API
Operating System
Ubuntu/Debian Linux
Terminal/Shell
Other
Additional Information
_No response_
7 Comments
Found 3 possible duplicate issues:
This issue will be automatically closed as a duplicate in 3 days.
🤖 Generated with Claude Code
Not quite the same as those other threads. Possibly related, but I think
opusplanmodel selection needs it's own check/fix as needed.@Drizzt321 for now a workaround is to set an env var or run following command:
ANTHROPIC_DEFAULT_OPUS_MODEL="claude-opus-4-6[1m]" claude@AnyCPU that doesn't seem to work for me :( On latest CC version too, 2.1.77
Closing for now — inactive for too long. Please open a new issue if this is still relevant.
Jeeze. Because nobody from Anthropic responded, there was no reason for anyone to comment, and thus it's inactive for too long?
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.