Frontier Model

Vital signs

Why it's on the table

On the table, Frontier Model (Fm) is seat 1 of 58, in the Intelligence family. It is a stable element — the category has settled, choosing is cheap, and switching is rare. Pick a holder and move on; this is not where your decision budget should go. It is marked essential: a company that leaves this seat empty is running with a gap that compounds. It sits in the mid price band — a real line item that should earn its keep visibly.

Frontier Model: the top 5 — v2026.Q3

Edition v2026.Q3 · ranking, pricing and status verified 2026-08-06.

1. 1ClaudeAnthropic

   Free · Pro $17–20/mo · Max from $100/mo · Team $20–25/seat · API: Opus 5 $5/$25, Fable 5 $10/$50 per MTok

   Best for The primary model a founder goes deep on — hardest reasoning, long-horizon agentic work, and the whole Claude Code/Cowork surface on one subscription.

   Owns the top of every serious capability index: Opus 5 leads the Artificial Analysis Intelligence Index at 61 and Anthropic holds three of the top five slots (Aug 2026); Fable 5 (Jun 9, 2026) was the first model past 90% on core analytics benchmarks with a 1M-token window. The market agrees — 40% of enterprise LLM API spend (54% in coding, Menlo Ventures) and a $47B run-rate by May 2026, up from $9B at end-2025, now the largest of any AI lab.

   Watch Consumer distribution is tiny — ~2.1% of chatbot web traffic vs ChatGPT's ~57–67%. Fable 5 shipped, was suspended three days later (Jun 12), and only redeployed Jul 1 — frontier-tier access can move under you. Fable 5's $10/$50 pricing is the most expensive mainstream API on the market.

   #1 Artificial Analysis Intelligence Index: Claude Opus 5 at 61; Anthropic holds 3 of the top 5 slots (Aug 2026) [src] · $47B run-rate revenue (May 2026, from $9B end-2025); $65B Series H at $965B post-money (May 28, 2026) [src] · 40% of enterprise LLM API spend, 54% in coding (Menlo Ventures report, 2025→2026) [src]
   Site →Docs →

2. 2ChatGPT / GPT-5.6OpenAI

   Free · Go ~$4.50/mo · Plus $20/mo · Pro $200/mo · Team $25/seat · API: Sol $5/$30, Terra $2/$12, Luna $0.20/$1.20 per MTok (after Jul 30 cuts)

   Best for Broadest ecosystem and cheapest high-quality volume — the default when your users, integrations, and hires already live in ChatGPT.

   GPT-5.6 (Jul 9, 2026) split the flagship into durable Sol/Terra/Luna tiers, and the Jul 30 price cuts made Luna ($0.20/$1.20) the cheapest near-frontier API ever sold. Distribution is unmatched: ~900M weekly ChatGPT users (Feb 2026), 50M paying subscribers, $25B annualized revenue — the largest consumer AI footprint on earth.

   Watch The enterprise story is going the other way — API share fell from 50% (2023) to 27% (Menlo), and Sol (59) sits below Opus 5 (61) on the Intelligence Index. Still deeply unprofitable (~$14B/yr losses reported) despite a record $122B raise at $852B (Mar 2026). Pricing has four compounding multipliers (fast mode, long-context 2x over 272k, caching, residency) — worst-case Sol bills run ~4x list.

   ~900M weekly active users (Feb 27, 2026); $25B annualized revenue (Mar 2026); 50M paid subscribers [src] · GPT-5.6 launch Jul 9, 2026; Luna cut to $0.20/$1.20, Terra to $2/$12 per MTok on Jul 30, 2026 [src] · Enterprise API share 50% (2023) → 27% (Menlo Ventures, 2025→2026 report) [src]
   Site →Docs →

3. 3GeminiGoogle (DeepMind)

   Free · AI Plus $4.99/mo · AI Pro $19.99/mo · AI Ultra $99.99 (5x) / $199.99 (20x) · API: 3.1 Pro $2/$12 per MTok (≤200k ctx; higher above)

   Best for Multimodal work, 1M-token context at mid-tier prices, and founders already living on Google Workspace/Cloud — the best bundled-subscription value in AI.

   Gemini 3.1 Pro (GA Feb 19, 2026) is the abstract-reasoning standout — 94.3% GPQA Diamond, 77.1% ARC-AGI-2, 80.6% SWE-bench Verified — at $2/$12, a third of Sol's output price. Distribution is compounding: 900M Gemini app MAU (doubled YoY) and 1B+ AI Mode users announced at I/O 2026, with the subscription bundling TB-scale storage, Flow credits, and the Jules coding agent.

   Watch The flagship succession slipped: Gemini 3.5 Pro was announced May 19 at I/O with a 'next month' target and still hadn't shipped by early Aug — only 3.5 Flash made it out. Current 3.1 Pro sits below the Anthropic/OpenAI leaders on the Intelligence Index, and the Plus/Pro/Ultra×Flow-credits tiering is genuinely confusing to buy.

   Gemini app 900M MAU, 2x YoY; Search AI Mode past 1B MAU (Google I/O, May 2026) [src] · Gemini 3.1 Pro GA Feb 19, 2026: GPQA 94.3%, ARC-AGI-2 77.1%, SWE-bench Verified 80.6%, 1M ctx at $2/$12 [src] · Gemini 3.5 Pro announced May 19, 2026, still unreleased as of Jul 2026 — only 3.5 Flash shipped [src]
   Site →Docs →

4. 4GrokxAI (SpaceX, SPCX)

   Free · X Premium $8/mo · SuperGrok $30/mo · SuperGrok Plus $100 · Heavy $300 · API: Grok 4.5 $2/$6, Grok 4.3 $1.25/$2.50 per MTok

   Best for Real-time X/web data baked into the model, native video generation, and the cheapest frontier-flagship API on the market.

   Grok 4.5 (Jul 8, 2026) prices a frontier flagship at $2/$6 with a 500k context — a fraction of Fable 5 or Sol — and is the only frontier model with live X firehose grounding plus native 2K video generation. Backed by the Colossus buildout (~555k GPUs, ~2GW) and now inside the public SpaceX entity after the Feb 2, 2026 all-stock absorption and Jun 12 SPCX IPO.

   Watch Commercially it is a distant fourth: ~$500M annualized run-rate mid-2026 vs Anthropic's $47B and OpenAI's $25B, and 117M MAU vs Gemini's 900M. June 2026 moved all paid tiers to one shared weekly usage pool and retired budget models with two months' notice — plan churn is real. Moderation controversies keep it off many enterprise shortlists.

   Grok 4.5 flagship (Jul 8, 2026): $2/$6 per MTok, 500k context; SuperGrok $30/mo, Heavy $300/mo [src] · xAI absorbed into SpaceX Feb 2, 2026 ($230B standalone); SPCX IPO Jun 12, 2026, ~$1.49T market cap by late Jul [src] · Grok MAU 64M (early 2026) → 117M (Mar 2026); ~$500M annualized revenue mid-2026 [src]
   Site →Docs →

5. 5Meta AI (Muse Spark)Meta Superintelligence Labs

   Free on meta.ai and Meta AI app · API in private preview, no public pricing

   Best for Free frontier-class multimodal answers at consumer scale — and a bet that Meta's closed-model pivot produces a real fifth frontier seat.

   Muse Spark (Apr 8, 2026) is Meta's first frontier model and its first without open weights — top-5 on the Artificial Analysis Intelligence Index at launch (52) and 50.2% on Humanity's Last Exam, with strong multimodal and visual-STEM performance. Distribution through Meta's app family gives it the largest free frontier audience anywhere.

   Watch Not really buyable yet: the API is private-preview with no published pricing, and it trails rivals on coding and long-horizon agentic work (1,427 vs Claude Sonnet's 1,648 on agent tasks). Strategy whiplash — open-weights champion to closed model in one generation, with leadership saying future versions may reopen — makes it hard to build on. Enterprise share fell 16% → 8% (Menlo).

   Muse Spark launched Apr 8, 2026 — Meta's first closed-weights frontier model; Intelligence Index 52 (top-5 at launch), HLE 50.2% [src] · Meta enterprise LLM API share 16% (2023) → 8% (Menlo Ventures, 2025→2026) [src]
   Site →Docs →

Frontier Model: the top 7 compared

Edition v2026.Q3 · ranking, pricing and status verified 2026-08-06.

How to choose your frontier model

If you're picking your one primary model — the brief's own advice — and your work is judgment-heavy

Claude. Start on Opus 5 ($5/$25, Intelligence Index #1) and escalate to Fable 5 only for the hardest long-horizon work; a Pro/Max subscription carries Claude Code and Cowork with it.

If you're shipping AI inside a consumer product, or burning tokens at volume on routine tasks

GPT-5.6 Luna/Terra — $0.20/$1.20 and $2/$12 after the Jul 30 cuts undercut every frontier rival; keep Sol for the hard 5% of calls.

If your workload is multimodal (video, audio, images, PDFs) or lives on Google Workspace/Cloud

Gemini 3.1 Pro at $2/$12 with 1M context, and the AI Pro bundle at $19.99 — the strongest per-dollar consumer subscription in AI.

If you need real-time social/news signal or the cheapest frontier-flagship API

Grok 4.5 at $2/$6 — accepting the plan-churn and the fact that xAI's commercial traction is a rounding error next to the top three.

If your bill, privacy, or latency argument beats the capability argument

Don't buy a bigger frontier subscription — go to element Ow: DeepSeek V4-Flash (Index 50 at $0.14/$0.28) and Kimi K3 (Index 57, open) have closed most of the gap at ~1/10 the price.

Frontier Model: the whole field

16 more tools tracked in this category, including 7 dead, renamed, or sunsetting — a reference that hides the graveyard isn't one. Verified 2026-08-06.

Frontier Model: the category in numbers

Edition v2026.Q3 · ranking, pricing and status verified 2026-08-06.

• Enterprise LLM API spend hit $8.4B by mid-2025 (from $3.5B six months prior) and kept doubling; share now Anthropic 40% / OpenAI 27% / Google 21% / Meta 8% (Menlo Ventures) [src]
• Anthropic passed OpenAI in revenue: $47B run-rate (May 2026) vs OpenAI ~$25–33B; $65B Series H at $965B post and a confidential IPO filing (Jun 1, 2026) [src]
• OpenAI raised a record $122B at $852B post (Mar 2026) while running ~$14B/yr losses — scale-at-all-costs is still the strategy [src]
• xAI merged into SpaceX (Feb 2, 2026); combined SPCX IPO'd Jun 12, 2026 at $135/share — the first public frontier lab, ~$1.49T market cap by late Jul [src]
• Frontier price war: OpenAI cut Luna to $0.20/$1.20 and Terra to $2/$12 (Jul 30, 2026) as open-weight rivals (Kimi K3 Index 57, DeepSeek V4-Flash Index 50 at $0.14/$0.28) closed the capability gap [src]
• The open-weights era ended at the top: Meta shipped its first closed frontier model (Muse Spark, Apr 8, 2026), completing the 'great re-closing' of US frontier labs [src]

Frontier Model: method & sources

Charter: ranked on verified capability (Artificial Analysis Intelligence Index, arena boards), what founders actually pay (vendor pricing pages, all checked Aug 6, 2026), enterprise adoption (Menlo Ventures), and financial durability — no affiliate consideration. Scope: proprietary frontier subscriptions/APIs only — open-weight families (Llama, DeepSeek, Kimi, GLM, Qwen, Mistral's flagships) → Ow; routers (OpenRouter, LiteLLM) → Rt; coding agents built on these models → Ca; Perplexity and deep-research products → Re. Conflicts resolved: (1) Menlo enterprise share — we cite the later 2025→2026 report (Anthropic 40/OpenAI 27) over the mid-2025 cut (32/25); (2) Google AI Ultra pricing — vendor page ($99.99 5x / $199.99 20x) over I/O-recap paraphrases ('$250→$200'); (3) Claude Pro $17–20 and Team $20–25 from claude.com/pricing over Sacra's $20/$30; (4) OpenAI revenue — $25B annualized (Mar 2026) is the consistently reported figure, Sacra's '$33B by May' is higher and unconfirmed, flagged accordingly; (5) benchmark leader — Intelligence Index (Opus 5 #1) and LMArena text (Fable 5 ~1508) currently agree on Anthropic, but Gemini 3.1 Pro leads ARC-AGI-style abstract reasoning; we weight the composite index. Weak-source flags: OpenAI 900M-WAU/$25B and Grok MAU/revenue figures come from stat aggregators tracing to press reports, not filings; the $122B OpenAI round and Meta's agent-task Elo are effectively single-source; Fable 5's HLE 53.3% is aggregator-only. Meta's Muse Spark API remains private-preview with no public pricing — its #5 rank is a distribution-and-trajectory call, not a buyability one. Gemini 3.5 Pro was announced May 19, 2026 and had still not shipped at press time; treat any '3.5 Pro benchmark' claims as vapor until GA. Ranking criteria: verified commercial traction, independent satisfaction surveys, agent benchmarks, and founder-fit (price floor, lock-in, surfaces). Editorial, never paid — the charter. Machine-readable twin: fm.json.

Our take

Pick one primary model and go deep. Model-hopping is procrastination with extra steps; the switching cost is your prompts, not the subscription.

Combines with

Appears in compounds

The Solo-Founder Compound · The Agent Stack

Guides

Best frontier model for startups (2026)