Best AI models that run on MacBook Air M5 (16 GB)
What models fit this build
MacBook Air M5 (16 GB) has 11 GB of usable memory. Here's which open-weights model sizes fit at each quant, at ~8K context with an FP8 KV cache.
Largest comfortable fit: 13–14B at Q5 (~11 GB).
| Model size | Q2 | Q4 | Q5 | Q8 |
|---|---|---|---|---|
| 7–8B | Fits | Fits | Fits | Fits |
| 13–14B | Fits | Fits | Fits | Won't fit |
| 30–32B | Won't fit | Won't fit | Won't fit | Won't fit |
| 70–72B | Won't fit | Won't fit | Won't fit | Won't fit |
| ~120B MoE | Won't fit | Won't fit | Won't fit | Won't fit |
| ~235B MoE | Won't fit | Won't fit | Won't fit | Won't fit |
| ~670B MoE | Won't fit | Won't fit | Won't fit | Won't fit |
| 1T+ MoE | Won't fit | Won't fit | Won't fit | Won't fit |
✓ = the weights + FP8 KV cache fit within this build's usable memory at ~8K context. Longer context needs more — size any model in the picker →
Closed-frontier reference (May 2026)
What "API-grade" actually scores right now. Use this as the ceiling — anything local will lag here by some margin, and that's fine for most workflows.
Gemini 3.1 Pro
- HLE44.7%
- Terminal-Bench 280.2%
- SWE-Bench Pro54.2%
- SWE-Bench Ver80.6%
- Aider Polyglot—
- LiveCodeBench91.7%
- GPQA Diamond94.3%
- MMLU-Pro91.0%
Coding: Coding-strong, especially repo-level work with 2M context. Less of a Cursor/Cline default than Claude — Gemini Code Assist users prefer it. Top of leaderboards on GPQA + LCB. Now #7 on OpenRouter coding by volume (120B tokens) — Gemini 3.5 Flash will displace it next month.
Agent: TB2 80.2 makes it agent-grade. Used widely on Google's Agent Builder; less common in Open-Claude/Hermes. Reliable in long Vertex-AI Agent runs (multi-hour).
ChatGPT 5.5
- HLE52.2%
- Terminal-Bench 282.0%
- SWE-Bench Pro58.6%
- SWE-Bench Ver88.7%
- Aider Polyglot88.0%
- LiveCodeBench—
- GPQA Diamond93.6%
- MMLU-Pro—
Coding: Codex CLI + GPT-5.5 is the top of Terminal-Bench. r/ChatGPTCoding has shifted to it for daily coding; Cursor users mixed (some prefer Claude Sonnet 4.6 for diff quality).
Agent: Strongest published agent score (TB2 82.0%, re-verified 2026-05-14). Widely used in OpenAI Assistants, AutoGPT-style swarms, and Open-Claude routing. Reliable in 4-8h autonomous sessions.
Claude Sonnet 5
- HLE57.4%
- Terminal-Bench 280.4%
- SWE-Bench Pro63.2%
- SWE-Bench Ver—
- Aider Polyglot—
- LiveCodeBench—
- GPQA Diamond—
- MMLU-Pro—
Coding: Anthropic's 2026-06-30 release: near-Opus intelligence at the old Sonnet price. Terminal-Bench 2.1 jumps to 80.4 (from Sonnet 4.6's 53.4), putting it in the top tier of agentic coders next to GPT-5.5 (82) and Gemini 3.1 Pro (80.2). 1M context, adaptive thinking on by default; the daily workhorse for Cursor / Zed / Cline users who want closed-model diff quality.
Agent: TB2 80.4 makes Sonnet 5 a top-tier agent driver (Sonnet 4.6 was mid-tier at 53.4). SWE-Bench Pro 63.2 lands between GPT-5.5 (58.6) and Opus 4.7 (69.2). Anthropic's tool-use SDK keeps it the most reliable closed model for hand-rolled agent loops.
Claude Opus 4.8
- HLE57.9%
- Terminal-Bench 2—
- SWE-Bench Pro69.2%
- SWE-Bench Ver88.6%
- Aider Polyglot—
- LiveCodeBench—
- GPQA Diamond93.6%
- MMLU-Pro—
Coding: Cursor / Cline / Zed power-user pick when budget allows. SWE-Pro 69.2 and TB2.1 74.6 say it all — best closed model for real software engineering. Simon Willison describes it as 'a modest but tangible improvement' over Opus 4.7 (simonwillison.net/2026/May/28/claude-opus-4-8/). 4x less likely to miss code flaws vs predecessor.
Agent: Top closed agent with SWE-Pro 69.2 and new 'dynamic workflow' tooling (Claude Code 2.1.154). Powers production Hermes / Open-Claude setups. TB2.1 74.6 per Anthropic self-report — TB2.0 leaderboard not yet updated. Fast mode at $10/$50 reduces agentic cost vs standard rate.
Every open-weights model that fits, ranked by composite score
Composite blends benchmark averages (60 %) with editorial 0-5 ratings (40 %). Closed-frontier references mix into the ranking and stay amber-tinted.
| Model↕ | tg/s↕ | pp↕ | TTFT @ 100K↕ | HLE↕ | TB2↕ | SWE-Pro↕ | SWE-Ver↕ | Aider↕ | LCB↕ | GPQA↕ | MMLU-Pro↕ | Score↕ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Qwen 3.5 9B9 B · dense🤗 | 20 t/s | 320 pp | — | — | — | — | — | — | 65.6% | 81.7% | 82.5% | 4623 |
Gemma 4 12B Unified (dense)12 B · dense🤗 | 12 t/s | 170 pp | — | 5.2% | — | — | — | — | 72.0% | 78.8% | 77.2% | 3759 |
Llama 3.1 8B8 B · dense🤗 | 22 t/s | 320 pp | — | — | — | — | — | — | — | 34.6% | 49.0% | 2527 |
| 22 t/s | 320 pp | — | 2.8% | — | — | — | — | — | 47.0% | 65.5% | 2325 | |
| Gemini 3.1 ProGoogle DeepMind · closed | 125 t/s | — | 2.1 min | 44.7% | 80.2% | 54.2% | 80.6% | — | 91.7% | 94.3% | 91.0% | — |
| ChatGPT 5.5OpenAI · closed | 61 t/s | — | 1.6 min | 52.2% | 82.0% | 58.6% | 88.7% | 88.0% | — | 93.6% | — | — |
| Claude Sonnet 5Anthropic · closed | — | — | — | 57.4% | 80.4% | 63.2% | — | — | — | — | — | — |
| Claude Opus 4.8Anthropic · closed | 59 t/s | — | 2.9 min | 57.9% | — | 69.2% | 88.6% | — | — | 93.6% | — | — |
Last updated 2026-07-11