AI Model Use-Case Comparison

Task	Claude (Anthropic)			ChatGPT (OpenAI)			Gemini (Google)			Copilot (Microsoft)			Grok (xAI)
Task	Haiku 4.5 Lightest	Sonnet 4.6 Balanced	Opus 4.6 Heaviest	Mini / Fast Lightest	Standard Balanced	Thinking Heaviest	Flash-Lite Cheapest	2.5 Flash Balanced	2.5 Pro Heaviest	Quick Resp. Fast	Smart Balanced	Think Deeper Heaviest	Grok 4 Fast Cheapest	Grok 4 Balanced	Grok 4 Heavy Heaviest
Coding
Quick code checkDebug / syntax / review	Skip Misses subtle logic faults	Sonnet ★ Catches logic errors; explains fixes clearly at mid cost	Skip Overkill for spot checks	o4-mini ★ Fast reasoning; solid for syntax and quick logic	Skip More than needed	Skip Reserved for architecture	Skip Flash handles this better	Flash ★ Good code review reasoning at low cost	Skip Overkill	Skip Too surface-level for code review	Smart ★ GPT-5 routing; handles syntax review inside M365 context	Skip Overkill for spot checks	Fallback Capable at low cost; slightly less precise than Sonnet	Grok 4 ★ Strong code comprehension; real-time context via X search	Skip Heavy is overkill for quick checks
Full app buildMulti-file, architecture	Skip Loses coherence across files	Fallback Good for scoped modules; not full architecture	Opus ★ Best-in-class for multi-file consistency	Skip Not suited for large context	Fallback Solid but thins on complex architecture	Thinking ★ Handles multi-file logic and architecture planning	Skip Wrong tier	Fallback Good value; may need re-prompting on deep logic	2.5 Pro ★ Strong on large codebases; 1M token context	Skip Not suited for this	Fallback Handles scoped builds; weaker on full architecture	Think Deeper ★ Multi-step reasoning via o1; good for architecture planning in M365 context	Skip Fast model not suited here	Fallback Capable but lacks long-horizon file coherence	Heavy ★ Multi-agent system; top coding benchmarks; suited for complex builds
Full web buildHTML / CSS / JS / layout	Skip Not reliable for responsive builds	Fallback Good for isolated components	Opus ★ Handles CSS, semantics, responsiveness, and accessibility together best	Skip Too lightweight	Fallback Reasonable for scoped front-end work	Thinking ★ Integrates front/back-end well	Skip Too lightweight	Fallback Capable, especially front-end generation	2.5 Pro ★ Strong at visual web apps; excellent CSS reasoning	Skip Not suited	Fallback Handles component-level work	Think Deeper ★ Good for full-stack structure and UI reasoning chains	Skip Not suited	Fallback Capable but less holistic on CSS and accessibility	Heavy ★ Strong full-stack reasoning; competitive with Opus here
Writing
Quick social postsShort copy, captions	Haiku ★ Fast, capable, no wasted quota	Skip More than needed	Skip Wasteful	Fast ★ Speed over depth; handles short-form well	Skip Overkill	Skip Unnecessary	Flash-Lite ★ Lowest cost of any option; fully sufficient for captions and short copy	Skip Spends more than needed	Skip Never use Pro for captions	Quick Resp. ★ Instantaneous; good for simple social copy drafts	Skip Overkill for captions	Skip Never needed here	4 Fast ★ Very low cost; capable for short-form output	Skip Overkill	Skip Never appropriate here
Long-form blog1,000–3,000+ words	Skip Loses voice over length	Sonnet ★ Best voice-matching and narrative consistency of any platform at mid cost	Upgrade if Only when post requires expert synthesis	Skip Not reliable long-form	Standard ★ Maintains tone and flow over 2,000+ words	Skip Reserved for research-heavy writing	Skip Loses coherence	Flash ★ Reasonable; outputs tend verbose, edit after	Upgrade if Deep research synthesis in the same pass	Skip Too shallow for structured long-form	Smart ★ GPT-5 routing handles long-form well; good if you're already in M365	Skip Reserved for research-dense writing	Skip Fast model not suited for long-form	Grok 4 ★ Solid long-form; real-time data helps with topical freshness	Skip Overkill for blogging
Research and Strategy
Article researchSource synthesis, fact-finding	Skip Not built for source synthesis	Sonnet ★ Solid with web search enabled; identifies gaps well	Upgrade if High-stakes accuracy required	Skip Too lightweight	Standard ★ Strong synthesis; Deep Research mode helps	Upgrade if Research feeds strategic decision-making	Skip Not appropriate for research depth	Flash ★ Google Search grounding; efficient fact-finding	Upgrade if Academic or complex cross-reference synthesis	Skip Too shallow for research	Smart ★ Search mode + Microsoft Graph grounding; best-in-class for enterprise research synthesis	Upgrade if Multi-doc synthesis requiring deep inferential reasoning	Skip Not suited for research depth	Grok 4 ★ Real-time X and web data; strong for current events research	Upgrade if Complex multi-source synthesis under time pressure
Prompt engineeringBuild prompts for AI tools	Skip Lacks meta-reasoning	Fallback Works for simpler prompts; misses edge cases	Opus ★ Reasons about model behavior; catches failure modes — best meta-reasoning of any platform	Skip Not appropriate	Standard ★ Precise instruction building; strong here	Upgrade if Prompt runs in agentic workflows	Skip Wrong tier	Fallback Adequate for basic construction	2.5 Pro ★ Deep Think applies step-by-step reasoning to prompt logic	Skip Not suited	Fallback Handles basic prompt drafting	Think Deeper ★ Reasoning model breaks down prompt structure and failure paths	Skip Not suited	Fallback Decent but less precise on edge cases	Heavy ★ Strong multi-step reasoning on prompt design; competitive with Opus
Additional Common AI Use-Cases
Email draftingClient, internal, outreach	Haiku ★ Clean professional copy at lowest Claude cost; best overall value for routine email	Upgrade if Tone-sensitive or high-stakes	Skip No justification	Fast ★ Reliable tone control at low cost	Upgrade if Complex negotiation emails	Skip Never needed	Flash-Lite ★ Sufficient for routine drafts at lowest cost	Upgrade if Nuanced bulk drafting	Skip Never appropriate	Quick Resp. ★ Native Outlook integration; instant drafting in context	Upgrade if Email requires broader context from your M365 data	Skip Never appropriate	4 Fast ★ Capable at very low cost	Skip Overkill for email	Skip Never appropriate
Data analysisCSV, metrics, pattern-finding	Skip Not suited for complex inference	Fallback Surface-level pattern summaries	Opus ★ Strong reasoning across ambiguous datasets	Skip Not suited	Fallback Structured summaries and basic interpretation	Thinking ★ Handles large CSVs and multi-step interpretation	Skip Not appropriate	Fallback Reasonable structured summaries	2.5 Pro ★ Excellent for large datasets; handles visualizations	Skip Not suited	Fallback Useful when data lives in Excel via M365	Think Deeper ★ Native Excel integration + deep reasoning; strong for business data	Skip Not suited	Fallback Capable but less precise on ambiguous data	Heavy ★ Top benchmark reasoning; multi-agent handles complex multi-dataset inference best
Document summaryPDFs, contracts, reports	Skip Misses nuance in dense docs	Sonnet ★ Reliable structure extraction; good context handling	Upgrade if Legal docs requiring inferential judgment	Skip Not suited	Standard ★ Strong at pulling key points from long documents	Upgrade if Legal interpretation required	Fallback Straightforward docs at very low cost	Flash ★ 1M token context window built for this; best value for document-scale summarization	Upgrade if Complex multi-document synthesis	Skip Not suited	Smart ★ Native Word/SharePoint integration; pulls from your actual org docs	Upgrade if Synthesis requires strategic interpretation	Skip Context window too small for large documents	Grok 4 ★ 2M token context; can handle extremely long documents	Upgrade if Multi-doc analysis under strict accuracy requirements
BrainstormingIdeas, concepts, angles	Fallback Simple brainstorms; ideas repeat faster	Sonnet ★ Better variety, fewer clichés	Skip Depth over breadth not what brainstorming needs	Fast ★ Rapid-fire generation; highest idea variety at lowest cost — best overall for brainstorming	Upgrade if Strategic framing needed in the ideas	Skip Overthinks ideation	Flash-Lite ★ Fast, low-cost; solid for agendas and concept lists	Upgrade if Brainstorm needs research integration	Skip Overkill	Quick Resp. ★ Fast ideation; M365 context helps for work-specific brainstorming	Upgrade if Ideas need to draw on your org's documents or data	Skip Overthinks it	4 Fast ★ Real-time X data helps with trend-based ideation	Skip Overkill for ideation	Skip Never appropriate here
SEO and metadataTitle tags, meta, alt text	Haiku ★ Character-constrained rules are a perfect Haiku fit	Skip Unnecessary	Skip Never use Opus for metadata	Fast ★ High volume, low complexity; handles SEO at scale	Skip Not needed	Skip Wasteful	Flash-Lite ★ Lowest cost of any platform; fully capable for structured metadata output at scale	Skip Overkill	Skip Never appropriate	Quick Resp. ★ Fast and sufficient for metadata drafts	Skip Not needed	Skip Never appropriate	4 Fast ★ Very low cost; capable for structured metadata output	Skip Overkill	Skip Never appropriate
Strategic planningBusiness decisions, proposals	Skip Not capable of competing variables	Fallback Lower-stakes planning	Opus ★ Excellent at risks, tradeoffs, and edge cases	Skip Not appropriate	Fallback Scoped strategy questions	Thinking ★ Multi-step reasoning and tradeoff analysis	Skip Not appropriate	Fallback Tactical planning; less reliable for complex risk	2.5 Pro ★ Deep Think excels at structured decision analysis	Skip Not appropriate	Fallback Useful when strategy draws on your M365 org data	Think Deeper ★ Deep reasoning on complex business problems; strong with org context loaded	Skip Not appropriate	Fallback Capable but less thorough on edge cases	Heavy ★ Top-tier multi-step reasoning; real-time data + benchmark tradeoff analysis — strongest overall
Automation workflowsAPIs, tools, logic chains	Skip Not suited for conditional logic at scale	Fallback Works for simpler automations	Opus ★ Agentic multi-step workflows are a core Opus strength; best overall for API logic chains	Skip Not appropriate	Fallback Handles moderate automation logic	Thinking ★ Conditional flows, API chains, error handling	Skip Not appropriate	Flash ★ Good for agentic tasks; code execution built in	Upgrade if Logic is deeply nested or failure is high-stakes	Skip Not appropriate	Fallback Handles M365 Power Automate-style logic	Think Deeper ★ Strong for complex M365 agent orchestration and multi-agent workflows	Skip Not appropriate	Fallback Capable for API logic; less proven agentic track record	Heavy ★ Multi-agent system suited for complex logic; competitive with Opus