Everyday Ecosystem — The Big Three AI Assistants

OpenAI's new default for people who actually get work done. It doesn't just answer — it plans, tools up, checks its own output, and finishes the messy multi-step job while you grab coffee. The shift from helpful chatbot to reliable digital colleague finally feels real.

GDPval 84.9% across 44 occupations (#1 overall); Artificial Analysis Intelligence Index #1 (+3 points); OSWorld-Verified 78.7% computer use; Tau2-Bench 98.0% for workflow agents; ~40% fewer output tokens at same latency; 1M context with native tool use.

2× API price ($5/$30 vs GPT-5.4's $2.50/$15); one early report flags high hallucination on omniscience evals — verify truth-critical work; API not live at launch ('very soon'); strongest safety guardrails yet may cause edge-case refusals.

Anthropic's first Mythos-class model made safe for everyone. The same architecture that powers the restricted Mythos 5, but with conservative safeguards that route risky queries to Opus 4.8. It delivers frontier performance on every benchmark that matters — SWE-Bench Pro 80.3%, FrontierCode Diamond 29.3%, Hebbia Finance #1 — and the lead widens as tasks get harder. For users who can afford premium pricing, this is the strongest generally accessible AI model in the world.

SWE-Bench Pro 80.3% (SOTA — crushes GPT-5.5's 58.6%). FrontierCode Diamond 29.3% (5× GPT-5.5). Hebbia Finance Benchmark #1. CursorBench SOTA. Stripe migrated 50M-line codebase in one day. Vision-only Pokémon FireRed completion. 3× better Slay the Spire with persistent memory vs Opus 4.8. $10/$50 per M tokens. 1M context. Available on claude.ai, API, Bedrock, Vertex, Foundry.

Premium pricing at $10/$50 per M tokens (2× Opus 4.8). Conservative safeguards route <5% of sessions to Opus 4.8 on flagged topics (cybersecurity, biology, chemistry). Not the unrestricted Mythos 5 (restricted to Project Glasswing). Independent third-party benchmarks still rolling in on launch day. Usage limits on Pro/Max plans during high demand.

Think of it as a profoundly educated research partner who actually takes a minute to think before answering. It trades instant speed for deep, methodical analysis. When your problem requires real, deliberate logic — not just a quick guess — this is Google's flagship brain upgrade.

Verified 77.1 on ARC‑AGI‑2. Generates text, videos (Veo), images (Nano Banana), and music (Lyria 3) natively. Deep Google ecosystem integration across mobile and web.

In public preview with a Jan 2025 knowledge cutoff — brilliant at reasoning but can be stale on late‑2025/2026 facts unless connected to search.

The calmest, most honest frontier model — now with sharper judgment and the ability to run long autonomous agent workflows without losing the plot. Opus 4.8 doesn't just hold a million tokens of context, it actually knows when it doesn't know something. Improved honesty calibration, Dynamic Workflows that coordinate hundreds of AI workers, and effort control that lets you choose speed or depth. The professional's AI, upgraded.

SWE-Bench Pro 69.2% (SOTA across all models). Knowledge work benchmark up from 1,753 to 1,890. Online-Mind2Web 83.4% (best browser agent tested). 100% end-to-end on Super-Agent benchmark. First model to break 10% on Legal Agent Benchmark. 1M-token context window. Agent Teams + Dynamic Workflows. Fast mode at 2.5× speed and 3× cheaper.

Still the most expensive of the big three — $20/month Pro gets you in the door, but power users pay $100–$200/month for Max. Deeper thinking burns more tokens per conversation. No native image generation. Smaller integration ecosystem than ChatGPT.