[Brave Leo]: Deprecate Claude Instant model

[LorenzoMinto]

Should migrate Claude Instant defaults to Claude Haiku

Test Plan:

• Not premium user
• Using a version before this commit, set Claude Instant to be the default
• Verify every new conversation uses Claude Instant
• Quit the browser and open again using this commit, with the same profile
• Verify that every new conversation uses Claude Haiku
• Repeat for premium user except every new conversation should now use Claude Sonnet

[mattmcalister]

Mapping to new models:

1. Llama 2 --> Llama 3
2. Claude Instant --> Haiku (Free Tier users)
3. Claude Instant --> Sonnet (Premium users)

[petemill]

I can take this to remove claude instant and migrate the prefs

[kjozwiak]

The above requires 1.67.102 or higher for 1.67.x verification 👍

[kjozwiak]

@hffvld @Uni-verse we'll need to wait till brave/brave-core#23911 is merged into master and uplifted into 1.67.x before we can run through the above on iOS.

[Uni-verse]

Verified on Samsung Galaxy S21 using version:

Brave	1.67.104 Chromium: 126.0.6478.26 (Official Build) beta (64-bit) 
Revision	9a4d1cb2f47a60953416cd3f39f0520e4dd4cf0e
OS	Android 13; Build/TP1A.220624.014; 33; REL

Case: New Users

• Ensured Claude instant is not available in the Language models section in the settings menu for new users.
• Ensured Claude Instant is removed from the default models in Advanced Settings.
• Ensured that Mixtral is the default model for new users.
• Ensured new conversations will start with Mixtral.

Example	Example	Example	Example

Case: Existing Users (Non-premium)

• Ensured that selecting Claude Instant and upgrading will default to Claude 3 Haiku for premium users.
• Ensured that Claude Instant is removed from the language selection menu.
• Ensured that non-premium users will still hit the paywall when using Haiku model.
• Ensured that switching to the free model enables user to continuing using chat after hitting the rate limit.
• Ensured that upgrading with all defaults still has Mixtral set.

Example	Example

Case: Existing Users (Premium)

• Ensured that selecting Claude Instant and upgrading will default to Claude 3 Sonnet for premium users.
• Ensured that Claude Instant is removed from the language selection menu.
• Ensured that new conversations start with Sonnet.
• Ensured chatting after switching to another model without issues.

Example	Example	Example

[stephendonner]

Verification PASSED using

Brave | 1.67.107 Chromium: 126.0.6478.26 (Official Build) beta (x86_64)
-- | --
Revision | 2831369c7540d93e98f38d9b463f6762430a7982
OS | macOS Version 11.7.10 (Build 20G1427)

(or higher, where otherwise noted)

New Users - Defaults (Mixtral) - PASSED

Steps:

1. installed 1.67.107
2. launched Brave
3. opened brave://settings/leo-assistant
4. confirmed Mixtral is chosen for Default model for new conversations
5. Summarize[d] this page
6. confirmed page summarization
7. asked Leo a couple questions

Confirmed Mixtral was continued to be used, by default, for queries

example	example	example	example	example	example

Upgrade Profile - Premium w/Claude Instant selected - PASSED

Steps:

1. installed 1.66.118
2. launched Brave
3. opened brave://settings/leo-assistant
4. confirmed Mixtral is the default model
5. changed Default model for new conversations to Claude Instant
6. confirmed queries worked
7. upgraded profile to Leo Premium via Buy now button on account.bravesoftware.com
8. quit Brave
9. installed 1.67.108
10. relaunched Brave
11. opened brave://settings/leo-assistant
12. loaded and summarized https://www.vox.com/climate/354222/death-valley-extreme-heat-record-climate-change

Confirmed Claude 3 Haiku is the Default model for new conversations listed

example	example	example	example	example	example	example	example

Upgrade Profile - non-Premium, w/Claude Instant selected - PASSED

Steps:

1. installed 1.66.118
2. launched Brave
3. opened brave://settings/leo-assistant
4. confirmed Mixtral is the default model
5. changed Default model for new conversations to Claude Instant
6. opened a new window/new-tab page
7. confirmed a query over Claude Instant worked
8. quit Brave
9. installed 1.67.108
10. relaunched Brave
11. opened brave://settings/leo-assistant

Confirmed Claude 3 Haiku is the Default model for new conversations listed

example	example	example	example	example	example	example	example	example

Upgrade Profile - Defaults (Mixtral) - PASSED

Steps:

1. installed 1.66.118
2. launched Brave
3. opened brave://settings/leo-assistant
4. confirmed Mixtral is the default model
5. confirmed queries worked
6. quit Brave
7. installed 1.67.107
8. relaunched Brave
9. opened brave://settings/leo-assistant
10. asked Leo a few questions
11. confirmed queries worked

Confirmed Mixtral is the Default model for new conversations listed

[hffvld]

Verified on iPhone 14 using version(s):

Device/OS: iPhone 14 / iOS 17.5.1
Brave build: 1.67 (115)
BraveCore: 1.67.115 (126.0.6478.56)

---

Fresh profile

ACTUAL RESULTS:

• Verified that Claude Instant is not available in the Language Models section in the settings menu for new users.
• Verified that Claude Instant is removed from the default models in Advanced Settings.
• Verified that Mixtral is the default model for new users.
• Verified that new conversations will start with Mixtral.

---

1	2	3

Upgraded profile (Non-premium)

ACTUAL RESULTS:

• Verified that selecting Claude Instant and upgrading will default to Claude 3 Haiku for non-premium users.
• Verified that Claude Instant is removed from the language selection menu.
• Verified that non-premium users will still hit the paywall when using Claude 3 Haiku model.
• Verified that switching to the free model enables a user to continue using chat after hitting the rate limit.
• Verified that upgrading with all defaults still has a Mixtral set.

---

1.66.1 - default	1.67 - default

1.66.1 - non-default	1.67 - non-default

Upgraded profile (Premium)

ACTUAL RESULTS:

• Verified that selecting Claude Instant and upgrading will default to Claude 3 Sonnet for premium users.
• Verified that Claude Instant is removed from the language selection menu.
• Verified that new conversations start with Claude 3 Sonnet.
• Verified that chatting after switching to another model has no issues.

---

1.66.1 - non-default	1.67 - non-default