1. OpenAI IPO markets led the day as traders repositioned around a possible listing by year end. The "Will OpenAI IPO by December 31, 2026?" contract climbed from 16% to 20% on $15,581 of volume, the deepest price action in either book, while the "IPO before 2027" market moved in step at 20%. The accompanying cap-bracket markets tell a cautious story: the sub-$500B and $500B-$750B brackets both printed 0%, the $750B-$1T bracket held at 5%, and the $1.5T+ bracket jumped 54% on a thin base (4% to 6%) that reflects a handful of trades rather than real conviction.
2. Model-release markets moved in the opposite direction, and one of them has a clear news catalyst. Kalshi's "Will SpaceXAI release Grok 4.7 before Aug 28, 2026?" contract fell 19% (26% to 21%) on the same day TechCrunch ran "Grok keeps sending gibberish responses to users," a direct hit to xAI's near-term release credibility. The related Aug 31 and Sep 4 Grok 4.7 brackets held at 29% and 44%, so traders are not abandoning the release entirely, just pushing its expected date later.
3. A second wave of release slippage showed up in Google and Anthropic markets with no matching headlines, which points to trader flow rather than news. "Will Google release Gemini 3.5 Pro before Aug 31, 2026?" halved from 10% to 5% on $2,224 of volume, and Anthropic's Sep 1 Mythos bracket dropped 50% (2% to 1%), while the Sep 1 Mythos-Class bracket eased to 24%. Kalshi's "top AI model this month" market also shifted away from claude-opus-5-max, which fell from 18% to 14%, suggesting traders are repricing near-term model leadership downward across the board.
4. Several price moves diverged from the day's news flow and deserve a flag. The "AI wins IMO gold medal in 2026?" market rose 27% (22% to 28%) with zero IMO coverage in today's feed, and "U.S. enacts AI safety bill before 2027?" gained 25% (10% to 12%) despite no legislative headline; both look like position-building ahead of events rather than sentiment-driven repricing. The biggest outlier is Ari Weinstein: "Will Ari leave OpenAI by December 31, 2026?" fell 20% (37% to 30%) on a quiet day, which implies traders learned something about his staying that is not in the public news stream, so the next OpenAI personnel headline will likely move this market further.
5. The broader tape showed stability beneath the headline movers. "Anthropic IPO before 2027?" stayed pinned at 86% on $3,977 of volume, "GPT-6 released by December 31, 2026?" eased slightly to 75% on $3,875, and 27 of the 50 monitored markets still trade below 10% Yes, a reminder that most of these brackets are long-shot tails. With 18 markets moving at least 5% in a day yet no direct news overlap in the feed, today's action is best read as quiet positioning ahead of the OpenAI IPO question rather than a headline-driven shock.
| Source | Market | Change | Time |
| Polymarket |
Will OpenAI’s market cap be $1.5T or greater at market close on IPO day? |
↑ 54% (4% → 6%) |
(vs ~24h ago) |
| Kalshi |
Will Anthropic release Mythos before Sep 1, 2026? |
↓ 50% (2% → 1%) |
(vs ~24h ago) |
| Kalshi |
Will Google release Gemini 3.5 Pro before Aug 31, 2026? |
↓ 50% (10% → 5%) |
(vs ~24h ago) |
| Polymarket |
AI wins IMO gold medal in 2026? |
↑ 27% (22% → 28%) |
(vs ~24h ago) |
| Polymarket |
Will OpenAI IPO by December 31 2026? |
↑ 25% (16% → 20%) |
(vs ~24h ago) |
| Polymarket |
U.S. enacts AI safety bill before 2027? |
↑ 25% (10% → 12%) |
(vs ~24h ago) |
| Kalshi |
What will be the top AI model this month? |
↓ 22% (18% → 14%) |
(vs ~24h ago) |
| Polymarket |
Will Ari Weinstein leave OpenAI by December 31, 2026? |
↓ 20% (37% → 30%) |
(vs ~24h ago) |
| Kalshi |
Will SpaceXAI release Grok 4.7 before Aug 28, 2026? |
↓ 19% (26% → 21%) |
(vs ~24h ago) |
| Polymarket |
Will OpenAI’s market cap be less than $500B at market close on IPO day? |
↓ 18% (1% → 0%) |
(vs ~24h ago) |
| # | Question | Yes | No | Change | Volume |
| 1 | Will OpenAI’s market cap be less than $500B at market close on IPO day | 0% | 100% |
↓ 18% (was 1%) (vs ~24h ago) | — |
| 2 | Will OpenAI’s market cap be between $500B and $750B at market close on | 0% | 100% |
| $129 |
| 3 | Will OpenAI’s market cap be between $750B and $1T at market close on I | 5% | 95% |
↑ 6% (was 5%) (vs ~24h ago) | $214 |
| 4 | Will OpenAI’s market cap be between $1T and $1.25T at market close on | 3% | 97% |
| $100 |
| 5 | Will OpenAI’s market cap be between $1.25T and $1.5T at market close o | 2% | 98% |
| — |
| 6 | Will OpenAI’s market cap be $1.5T or greater at market close on IPO da | 6% | 94% |
↑ 54% (was 4%) (vs ~24h ago) | $161 |
| 7 | Will OpenAI not IPO by December 31, 2026? | 80% | 20% |
| $3,485 |
| 8 | Will Dominik Szoboszlai win the 2026 Ballon d'Or? | 0% | 100% |
| — |
| 9 | Will Ari Weinstein leave OpenAI by December 31, 2026? | 30% | 70% |
↓ 20% (was 37%) (vs ~24h ago) | — |
| 10 | Will Conrad Kramer leave OpenAI by December 31, 2026? | 16% | 84% |
↑ 7% (was 15%) (vs ~24h ago) | — |
| 11 | OpenAI announces it has achieved AGI before 2027? | 8% | 92% |
| $22 |
| 12 | Will OpenAI IPO by December 31 2026? | 20% | 80% |
↑ 25% (was 16%) (vs ~24h ago) | $15,581 |
| 13 | OpenAI $1t+ IPO before 2027? | 18% | 82% |
↓ 8% (was 19%) (vs ~24h ago) | $25 |
| 14 | Will Trump meet with Lai Ching-te in 2026? | 4% | 96% |
| $5 |
| 15 | Will NVIDIA be the largest company in the world by market cap on Decem | 72% | 28% |
| $1,491 |
| 16 | OpenAI IPO before 2027? | 20% | 80% |
↑ 11% (was 18%) (vs ~24h ago) | $1,743 |
| 17 | Mistral AI IPO before 2027? | 8% | 92% |
| $2 |
| 18 | Anthropic IPO before 2027? | 86% | 14% |
| $3,977 |
| 19 | Will OpenAI launch a new consumer hardware product by December 31, 202 | 11% | 89% |
| $291 |
| 20 | OpenAI acquired before 2027? | 4% | 96% |
| — |
| 21 | Will GPT-6 be released by December 31, 2026? | 75% | 25% |
↓ 7% (was 80%) (vs ~24h ago) | $3,875 |
| 22 | AI wins IMO gold medal in 2026? | 28% | 72% |
↑ 27% (was 22%) (vs ~24h ago) | — |
| 23 | U.S. enacts AI safety bill before 2027? | 12% | 88% |
↑ 25% (was 10%) (vs ~24h ago) | $260 |
| 24 | Will OpenAI launch a token before 2027? | 2% | 98% |
↓ 8% (was 2%) (vs ~24h ago) | — |
| 25 | Anthropic acquired before 2027? | 2% | 98% |
| — |
| # | Question | Yes | No | Change | Volume |
| 1 | Will Anthropic release Opus 6 before Sep 16, 2026? (Before Sep 16, 2026) | 1% | 99% |
| $0 |
| 2 | Will Anthropic release Opus 6 before Sep 1, 2026? (Before Sep 1, 2026) | 1% | 99% |
| $0 |
| 3 | Will Anthropic release Opus 6 before Oct 16, 2026? (Before Oct 16, 2026) | 8% | 92% |
| $0 |
| 4 | Will Anthropic release Opus 6 before Oct 1, 2026? (Before Oct 1, 2026) | 4% | 96% |
| $0 |
| 5 | Will Anthropic release Opus 6 before Nov 1, 2026? (Before Nov 1, 2026) | 7% | 93% |
↓ 12% (was 8%) (vs ~24h ago) | $109 |
| 6 | Will Anthropic release next Mythos-Class model before Sep 1, 2026? (Before Sep 1, 2026) | 24% | 76% |
↓ 4% (was 25%) (vs ~24h ago) | $2,424 |
| 7 | Will Anthropic release next Mythos-Class model before Oct 1, 2026? (Before Oct 1, 2026) | 75% | 25% |
| $697 |
| 8 | Will Anthropic release next Mythos-Class model before Nov 1, 2026? (Before Nov 1, 2026) | 74% | 26% |
| $502 |
| 9 | Will Anthropic release Mythos before Jan 1, 2027? (Before Jan 1, 2027) | 17% | 83% |
| $569 |
| 10 | Will Anthropic release Mythos before Sep 1, 2026? (Before Sep 1, 2026) | 1% | 99% |
↓ 50% (was 2%) (vs ~24h ago) | $11 |
| 11 | Will Anthropic release Mythos before Oct 1, 2026? (Before Oct 1, 2026) | 4% | 96% |
| $0 |
| 12 | Will Anthropic release Mythos before Nov 1, 2026? (Before Nov 1, 2026) | 9% | 91% |
| $0 |
| 13 | Will Anthropic release Mythos before Dec 1, 2026? (Before Dec 1, 2026) | 15% | 85% |
| $128 |
| 14 | Will Google release Gemini 3.5 Pro before Aug 21, 2026? (Before Aug 21, 2026) | 2% | 98% |
| $0 |
| 15 | Will Google release Gemini 3.5 Pro before Aug 31, 2026? (Before Aug 31, 2026) | 5% | 95% |
↓ 50% (was 10%) (vs ~24h ago) | $2,224 |
| 16 | Will SpaceXAI release Grok 4.7 before Sep 4, 2026? (Before Sep 4, 2026) | 44% | 56% |
| $0 |
| 17 | Will SpaceXAI release Grok 4.7 before Aug 31, 2026? (Before Aug 31, 2026) | 29% | 71% |
| $281 |
| 18 | Will SpaceXAI release Grok 4.7 before Aug 28, 2026? (Before Aug 28, 2026) | 21% | 79% |
↓ 19% (was 26%) (vs ~24h ago) | $500 |
| 19 | Will SpaceXAI release Grok 4.7 before Aug 21, 2026? (Before Aug 21, 2026) | 4% | 96% |
| $0 |
| 20 | Will xAI release Grok 5 before Sep 1, 2026? (Before September) | 4% | 96% |
| $0 |
| 21 | Will xAI release Grok 5 before Jan 1, 2027? (Before 2027) | 68% | 32% |
| $19 |
| 22 | Will xAI release Grok 5 before Oct 1, 2026? (Before October) | 10% | 90% |
↑ 11% (was 9%) (vs ~24h ago) | $14 |
| 23 | What will be the top AI model this month? (qwen3.8-max) | 1% | 99% |
| $0 |
| 24 | What will be the top AI model this month? (claude-opus-5-max) | 14% | 86% |
↓ 22% (was 18%) (vs ~24h ago) | $464 |
| 25 | What will be the top AI model this month? (claude-fable-5) | 1% | 99% |
| $0 |