Anthropic vs OpenAI
Head-to-head for the week of 26 Oct 2026.
| Metric | Anthropic | OpenAI | Leads |
|---|---|---|---|
| Score | 97.2 5/5 | 68.6 5/5 | Anthropic |
| Rank | #1 | #3 | Anthropic |
| Coverage | 5/5 | 5/5 | n/a |
| Arena text (rank, score, model) | #2 · 1509 Claude Opus 5.5 (High) | #21 · 1485 GPT-5.6 Sol (xHigh) | Anthropic |
| AA Intelligence Index (index, position, model) | 57.6 · #1 Claude Opus 5.5 (Max, Default Fallback) | 52.7 · #9 GPT-6 Astra (Max) | Anthropic |
| Revenue run-rate | $67.2B Q3 2026 revenue × 4 (computed; $16.8B quarter told to investors, gross accounting) 30 Sept 2026 · CNBC (also Reuters, Bloomberg, FT) (opens in new tab) | $50B annualized run-rate, end of September (net of partner share) 30 Sept 2026 · Axios (opens in new tab) | Anthropic |
| Revenue (claimed, not scored) | n/a | $70B not scored | n/a |
| Valuation (latest closed) | $965B post-money, Series H 28 May 2026 · Anthropic (opens in new tab) | $852B post-money, $122B round 31 Mar 2026 · OpenAI (opens in new tab) | Anthropic |
| Valuation (in talks, not scored) | n/a | $1.25T not scored | n/a |
| Total funding (not scored) | $141B 30 Jun 2026 · Anthropic S-1 (SEC EDGAR) (opens in new tab) | $178B 16 Oct 2026 · StockAnalysis (funding database) (opens in new tab) | n/a |
| Polymarket 2026 #1 odds · Change vs 19 Oct 2026 | 53.5% +4pp | 5.7% −1.6pp | Anthropic |
| Arena component | 92 | 68 | Anthropic |
| AA component | 100 | 91.4 | Anthropic |
| Revenue component | 100 | 95.5 | Anthropic |
| Valuation component | 100 | 98.2 | Anthropic |
| Odds component | 100 | 10.7 | Anthropic |
Arena: manual snapshot as of 22 Oct 2026 (source). Artificial Analysis: fetched 26 Oct 2026 (source). Polymarket: fetched 26 Oct 2026 (primary market).
Other prediction markets
Which company has the best AI model end of October?
Anthropic11.8%
OpenAI0.65%
Which company has the best AI model end of November?
Anthropic45.5%
OpenAI4%
Compute (not scored)
Anthropic
- Compute contracted since Oct 2025: ≥14.8 GW (6 Sept 2026 · The Information via AI-RTZ (opens in new tab))
- Anthropic-Amazon New Carlisle, current IT power (est.): ~910 MW (15 Oct 2026 · Epoch AI (opens in new tab))
- Fixed/minimum compute & infrastructure commitments: ~$265.6B (30 Jun 2026 · Anthropic S-1, Note 13 (SEC EDGAR) (opens in new tab))
OpenAI
- Planned capacity by 2030 (told investors): 30 GW (9 Sept 2026 · AI-RTZ (opens in new tab))
- Compute spend forecast through 2030: ~$750B (9 Sept 2026 · AI-RTZ (The Information) (opens in new tab))
Compute figures use different methodologies across labs, so they're listed, not scored; see /compute/ for the comparable Epoch AI estimates (methodology).
History
| Week | Anthropic | OpenAI |
|---|---|---|
| 10 Oct 2026 backfilled | #2 · 93.9 | #3 · 68.8 |
| 17 Oct 2026 | #1 · 94.4 | #3 · 67.3 |
| 19 Oct 2026 | #1 · 94.4 | #3 · 66.9 |
| 22 Oct 2026 | #2 · 94.4 | #3 · 66.1 |
| 26 Oct 2026 | #1 · 97.2 | #3 · 68.6 |
FAQ
Which scores higher, Anthropic or OpenAI?
Anthropic (97.2/100 vs 68.6/100).
Which ranks higher on the Arena leaderboard?
Anthropic (#2 vs #21).
Which has the higher revenue run-rate?
Anthropic ($67.2B vs $50B).
Which has the higher 2026 Polymarket odds of the best AI model?
Anthropic (53.5% vs 5.7%).