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Merged
dimakis merged 3 commits into from
Sep 1, 2026
Merged

feat(models): add Opus 4.8 and Sonnet 5 #447

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d8a0fd0
feat(models): add Opus 4.8 and Sonnet 5, remove stale models
dimakis Aug 31, 2026
831bcc6
fix(models): remove stale claude-opus-4-7 references
dimakis Sep 1, 2026
1f20306
fix(models): fix remaining stale claude-opus-4-7 references in tests
dimakis Sep 1, 2026
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10 changes: 5 additions & 5 deletions frontend/src/lib/constants.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -9,11 +9,11 @@ export const WS_RECONNECT_POLL_MS = 5_000;
export const SCROLL_NEAR_BOTTOM_PX = 150;
export const SCROLL_RESTORE_DELAY_MS = 100;
export const LAST_SESSION_KEY = 'mitzo-last-session';
// Default model for new sessions. Opus 4.6 is used rather than 4.7 because
// 4.7 is not yet available on every supported provider (e.g. Vertex AI at
// time of writing) — picking a widely-available model keeps the out-of-box
// experience functional. Users with access can still select Opus 4.7 from
// the dropdown; the selection persists per-browser.
// Default model for new sessions. Opus 4.6 is used rather than 4.8 because
// 4.8 is not yet available on every supported provider — picking a widely-
// available model keeps the out-of-box experience functional. Users with
// access can still select Opus 4.8 from the dropdown; the selection persists
// per-browser.
export const DEFAULT_MODEL = 'claude-opus-4-6';

// --- Tool grouping ---
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6 changes: 3 additions & 3 deletions frontend/src/pages/ChatView.tsx
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Expand Up @@ -223,10 +223,10 @@ export function ChatView() {
onChange={(e) => setModel(e.target.value)}
disabled={messages.running}
>
<option value="claude-opus-4-7">Opus 4.7</option>
<option value="claude-opus-4-7:max">Opus 4.7 Max</option>
<option value="claude-opus-4-8">Opus 4.8</option>
<option value="claude-opus-4-8:max">Opus 4.8 Max</option>
<option value="claude-opus-4-6">Opus 4.6</option>
<option value="claude-opus-4-5">Opus 4.5</option>
<option value="claude-sonnet-5">Sonnet 5</option>
<option value="claude-sonnet-4-6">Sonnet 4.6</option>
<option value="claude-sonnet-4-5">Sonnet 4.5</option>
<option value="claude-haiku-4-5">Haiku 4.5</option>
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6 changes: 4 additions & 2 deletions frontend/src/pages/DesktopChatView.tsx
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Expand Up @@ -198,10 +198,12 @@ export function DesktopChatView() {
onChange={(e) => setModel(e.target.value)}
disabled={messages.running}
>
<option value="claude-opus-4-7">Opus 4.7</option>
<option value="claude-opus-4-7:max">Opus 4.7 Max</option>
<option value="claude-opus-4-8">Opus 4.8</option>
<option value="claude-opus-4-8:max">Opus 4.8 Max</option>
<option value="claude-opus-4-6">Opus 4.6</option>
<option value="claude-sonnet-5">Sonnet 5</option>
<option value="claude-sonnet-4-6">Sonnet 4.6</option>
<option value="claude-sonnet-4-5">Sonnet 4.5</option>
<option value="claude-haiku-4-5">Haiku 4.5</option>
</select>
<div className="mode-pills">
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4 changes: 2 additions & 2 deletions packages/client/__tests__/store.test.ts
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Expand Up @@ -792,11 +792,11 @@ describe('interruptMessage', () => {
store.getState().sendMessage('first');
lastWs.simulateMessage({ type: 'session_id', sessionId: 'sess-int3' });

store.getState().interruptMessage('urgent', { model: 'claude-opus-4-7' });
store.getState().interruptMessage('urgent', { model: 'claude-opus-4-8' });

const interrupts = lastWs.parsedSent().filter((m) => m.type === 'interrupt');
expect(interrupts).toHaveLength(1);
expect(interrupts[0].model).toBe('claude-opus-4-7');
expect(interrupts[0].model).toBe('claude-opus-4-8');
});

it('does not include model field when both opts and config are null', () => {
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27 changes: 17 additions & 10 deletions server/__tests__/model-spec.test.ts
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Expand Up @@ -7,26 +7,26 @@ describe('parseModelSpec', () => {
});

it('parses a plain model ID', () => {
expect(parseModelSpec('claude-opus-4-7')).toEqual({
model: 'claude-opus-4-7',
expect(parseModelSpec('claude-opus-4-8')).toEqual({
model: 'claude-opus-4-8',
effort: undefined,
});
});

it('splits model and effort on colon', () => {
expect(parseModelSpec('claude-opus-4-7:max')).toEqual({
model: 'claude-opus-4-7',
expect(parseModelSpec('claude-opus-4-8:max')).toEqual({
model: 'claude-opus-4-8',
effort: 'max',
});
});

it('handles trailing colon as empty effort', () => {
expect(parseModelSpec('claude-opus-4-7:')).toEqual({ model: 'claude-opus-4-7', effort: '' });
expect(parseModelSpec('claude-opus-4-8:')).toEqual({ model: 'claude-opus-4-8', effort: '' });
});

it('handles multiple colons — only splits on first', () => {
expect(parseModelSpec('claude-opus-4-7:max:extra')).toEqual({
model: 'claude-opus-4-7',
expect(parseModelSpec('claude-opus-4-8:max:extra')).toEqual({
model: 'claude-opus-4-8',
effort: 'max:extra',
});
});
Expand All @@ -38,27 +38,34 @@ describe('resolveThinking', () => {
});

it('returns adaptive for plain opus model', () => {
expect(resolveThinking('claude-opus-4-7')).toEqual({ type: 'adaptive' });
expect(resolveThinking('claude-opus-4-8')).toEqual({ type: 'adaptive' });
});

it('returns adaptive for opus 4-6', () => {
expect(resolveThinking('claude-opus-4-6')).toEqual({ type: 'adaptive' });
});

it('returns 128k budget for opus :max', () => {
expect(resolveThinking('claude-opus-4-7:max')).toEqual({
expect(resolveThinking('claude-opus-4-8:max')).toEqual({
type: 'enabled',
budgetTokens: 128_000,
});
});

it('returns 10k budget for sonnet', () => {
it('returns 10k budget for sonnet 4-6', () => {
expect(resolveThinking('claude-sonnet-4-6')).toEqual({
type: 'enabled',
budgetTokens: 10_000,
});
});

it('returns 10k budget for sonnet 5', () => {
expect(resolveThinking('claude-sonnet-5')).toEqual({
type: 'enabled',
budgetTokens: 10_000,
});
});

it('returns undefined for haiku', () => {
expect(resolveThinking('claude-haiku-4-5')).toBeUndefined();
});
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8 changes: 4 additions & 4 deletions server/__tests__/ws-handler-v2.test.ts
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Expand Up @@ -2364,7 +2364,7 @@ describe('handleInterruptV2 forwarding', () => {
sessionId: 'sess-resume',
prompt: 'urgent',
clientMsgId: 'i-resume',
model: 'claude-opus-4-7',
model: 'claude-opus-4-8',
},
ctx,
);
Expand All @@ -2373,7 +2373,7 @@ describe('handleInterruptV2 forwarding', () => {
transport,
'c2:sess-resume',
'urgent',
expect.objectContaining({ resume: 'sess-resume', model: 'claude-opus-4-7' }),
expect.objectContaining({ resume: 'sess-resume', model: 'claude-opus-4-8' }),
);
});

Expand Down Expand Up @@ -2435,7 +2435,7 @@ describe('handleInterruptV2 forwarding', () => {
sessionId: 'sess-precedence',
prompt: 'override',
clientMsgId: 'i-precedence',
model: 'claude-opus-4-7',
model: 'claude-opus-4-8',
},
ctx,
);
Expand All @@ -2444,7 +2444,7 @@ describe('handleInterruptV2 forwarding', () => {
transport,
'c4:sess-precedence',
'override',
expect.objectContaining({ resume: 'sess-precedence', model: 'claude-opus-4-7' }),
expect.objectContaining({ resume: 'sess-precedence', model: 'claude-opus-4-8' }),
);
});

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8 changes: 4 additions & 4 deletions server/chat.ts
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Expand Up @@ -366,16 +366,16 @@ export function getRepoConfig() {
}

export const AVAILABLE_MODELS = [
{ id: 'claude-opus-4-7', label: 'Opus 4.7', desc: 'Adaptive thinking' },
{ id: 'claude-opus-4-7:max', label: 'Opus 4.7 Max', desc: 'Max thinking (128k)' },
{ id: 'claude-opus-4-8', label: 'Opus 4.8', desc: 'Latest Opus' },
{ id: 'claude-opus-4-8:max', label: 'Opus 4.8 Max', desc: 'Max thinking (128k)' },
{ id: 'claude-opus-4-6', label: 'Opus 4.6', desc: 'Previous Opus' },
{ id: 'claude-opus-4-5', label: 'Opus 4.5', desc: 'Legacy Opus' },
{ id: 'claude-sonnet-5', label: 'Sonnet 5', desc: 'Latest Sonnet' },
{ id: 'claude-sonnet-4-6', label: 'Sonnet 4.6', desc: 'Balanced' },
{ id: 'claude-sonnet-4-5', label: 'Sonnet 4.5', desc: 'Previous Sonnet' },
{ id: 'claude-haiku-4-5', label: 'Haiku 4.5', desc: 'Fastest' },
];

/** Split "claude-opus-4-7:max" → { model: "claude-opus-4-7", effort: "max" } */
/** Split "claude-opus-4-8:max" → { model: "claude-opus-4-8", effort: "max" } */
export function parseModelSpec(spec?: string): { model: string; effort: string | undefined } {
if (!spec) return { model: '', effort: undefined };
const idx = spec.indexOf(':');
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