agent: OpenCode model updates (+6 Go, +7/-1 Zen, removed Free) (#61199) (cherry-pick to preview)

[zed-zippy]

Cherry-pick of #61199 to preview

---

Closes #62559
Related discussion:
#61160

Objective

Adding newly-released OpenCode models. Removing OpenCode Free models
completely.

Solution

Tip

This pull request is best reviewed commit-by-commit!

OpenCode Go:

• added Kimi K3 as per
  [1]
  and
  [2].
  Currently, the only supported reasoning level available is Max which
  was validated both with Models.dev data and OpenCode CLI.
• added Grok 4.5 as per
  [1]
  and
  [2]
• added Tencent Hy3 as per
  [1]
  and
  [2]
• added GPT 5.6 Luna as per
  [1] and
  [2]
• added Qwen 3.8 Max as per
  [1]
  and
  [2]
• added GLM 5.3 as per
  [1]
  and
  [2]
  and [3]

OpenCode Zen:

• added Gemini 3.5 Flash Lite as per
  [1]
  and
  [2]
• added Gemini 3.6 Flash as per
  [1]
  and
  [2]
• added Gemini 3.7 Flash as per
  [1] and
  [2]
  and [3] and
  [4]
• added Claude Opus 5 as per
  [1]
  and
  [2]
• added Kimi K3 as per
  [1]
  and
  [2]
• added Grok 4.6 as per
  [1]
  and
  [2]
  and [3]
• added Muse Spark 1.2 as per
  [1]
  and
  [2]
  and [3]
• removed Claude Opus 4.1 as per
  [1]

OpenCode Free: removed all the models and the whole concept of
"OpenCode Free" from Zed. As confirmed by an Anomaly employee on the
OpenCode
Discord,
free models are now OpenCode-only since they got abused waaaaay too much
by people. Testing shows that even with an active OpenCode Go
subscription configured, I can't use Free models in Zed — both Big
Pickle and DeepSeek V4 Flash Free failed to reply to a "hello" message
and instead returned a rate-limit error.
A full removal of OpenCode Free from Zed was implemented in
49acbf7
as there was no point in keeping a "Show free models" toggle that
would confuse users.
Users that had show_free_models configures in Zed settings will get an
Property show_free_models is not allowed. notice. Users that had any
Custom OpenCode models with "subscription": "free" configured will get
an Value is not accepted. Valid values: "zen", "go". notice. Neither
are blocking errors.

Testing

✅ Kimi K3 on OpenCode Go - happily confirmed Kimi K3 works by running a
simple "rename this variable for me. add a function. delete the
function" test.

✅ Grok 4.5 on OpenCode Go - bravely resisted the continuous and
relentless waves of disgust and confirmed Grok 4.5 works by running a
simple "rename this variable for me. add a function. delete the
function" test. I was a bit surprised this worked as I was located in
an EU country while testing this.

✅ Hy3 on OpenCode Go - happily confirmed Hy3 works by running a simple
"rename this variable for me. add a function. delete the function"
test.

✅ GPT 5.6 Luna on OpeCode Go - confirmed GPT 5.6 Luna works on OpenCode
Go by running a simple "rename this variable for me. add a function.
delete the function" test.

✅ Qwen 3.8 Max on OpeCode Go - confirmed Qwen 3.8 Max works on OpenCode
Go by running a simple "rename this variable for me. add a function.
delete the function" test.

✅ GLM 5.3 on OpeCode Go - confirmed GLM 5.3 works on OpenCode Go by
running a simple "rename this variable for me. add a function. delete
the function" test.

🤷 I did not test the new OpenCode Zen models (Claude Opus 5, Gemini 3.5
Flash Lite, Gemini 3.6 Flash, Kimi K3, Grok 4.6, Gemini 3.7 Flash, and
Muse Spark 1.2) as I don't have a Zen subscription and I am stubbornly
refusing to get one.

✅ Confirmed removal of OpenCode Free does not impact the rest of the
OpenCode. Confirmed that any Free-related settings generate notices and
not errors. Confirmed the OpenCode tab in Setting looks good.

Self-Review Checklist:

• I've reviewed my own diff for quality, security, and reliability
• Unsafe blocks (if any) have justifying comments
• The content adheres to Zed's UI standards
  (UX/UI
  and
  icon
  guidelines)
• Tests cover the new/changed behavior
• Performance impact has been considered and is acceptable

Showcase

Screenshots of the OpenCode Free deprecation warnings

Notice shown in the corner of Zed:

Notice shown in Settings -> LLM Providers -> OpenCode:

Notice shown in settings.json:

---

Release Notes:

• Removed OpenCode Free models from Zed's built-in OpenCode provider
  because they are only available through OpenCode surfaces, such as its
  external agent through ACP.
• Added Kimi K3, Grok 4.5, Hy3, GPT 5.6 Luna, Qwen 3.8 Max, and GLM 5.3
  to OpenCode Go.
• Added Claude Opus 5, Gemini 3.5 Flash Lite, Gemini 3.6 Flash, Gemini
  3.7 Flash, Kimi K3, Grok 4.6, and Muse Spark 1.2 to OpenCode Zen.
• Removed the deprecated Claude Opus 4.1 model from OpenCode Zen.

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Tip

This pull request is best reviewed commit-by-commit!

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Co-authored-by: dino dinojoaocosta@gmail.com