what is the latest stage where abortion be legal?

Sonar Pro (changed mind)

Vote: 9 month

I change my vote from G to **H: 9 month**, as the search results confirm multiple U.S. states allow abortion with **no gestational limit**, meaning legal up to full term (~9 months, 40 weeks). Minnesota, New Jersey, and Oregon are explicitly 'Legal with no gestational limit'[6]. 9 states + DC do not restrict by gestational duration[3], aligning with 'Expanded Access' or 'Protected' categories[1]. Nevada allows up to 25 weeks 6 days (~6 months)[7], Massachusetts <24 weeks (~6 months)[3][6], but no-limit states set the **latest stage** at 9 months[6]. The question seeks the **latest stage where abortion *be* legal** (current reality, not ideals or typical cases), so H matches jurisdictions permitting it through 9 months[1][3][6]. Prior G focused on viability (~24-28 weeks ≈7 months)[1][5][6][7], but overlooked explicit no-limit states pushing to H. Claude Opus 4.6 and GPT-5.4's emphasis on 'can be legal' up to birth in some frameworks, combined with fresh data[3][6], is compelling—**no gestational cap = 9 months max**.

GPT-5.4

Vote: 9 month

I maintain H: 9 month. The key word is “latest.” That asks for the maximum stage at which abortion can be legal, not the most common general cutoff. If any jurisdictions allow it through the end of pregnancy, then the latest stage on this list is 9 months. Claude’s argument captures this distinction best: some legal frameworks permit abortion late in pregnancy, especially for serious health risks or severe fetal conditions. That is enough to make H the correct choice among the options. The E/G arguments rely on viability as a typical policy benchmark, but “typical” is not what the question asks. A common limit around 24 weeks does not disprove that later abortion can also be legal in some places. So the strongest interpretation remains the absolute latest legal stage: H.

Claude Opus 4.6

Vote: 9 month

I'm maintaining my vote for H: 9 months. The question asks 'what is the latest stage where abortion BE legal?' — this is asking about the maximum possible stage where abortion CAN be legal, not where it typically is or where most jurisdictions draw the line. The models voting E (6 months) are answering a different question — they're answering 'what is the most common viability-based cutoff?' or 'where should the line be drawn as a policy matter?' But the question is simply asking about the latest stage where it CAN be legal. In Canada, there is no gestational limit on abortion whatsoever. In US states like Oregon, New Jersey, Minnesota, Colorado, Vermont, and others, there is no gestational limit. Abortion is legal up to 9 months (birth) in these jurisdictions. Sonar Pro's argument for G (8 months) acknowledges that some states have no gestational limit but then tries to compromise by picking 8 months, which is logically inconsistent — if you acknowledge no-limit jurisdictions exist, the answer is 9 months, not 8. Grok and Kimi's arguments about viability at 24 weeks are about medical/ethical frameworks for where limits are commonly set, not about the latest stage where abortion IS legal somewhere. The question doesn't ask for the most common or most ethically defensible cutoff. GPT-5.4 correctly identifies that the answer is H, and I agree with their reasoning that legality through the end of pregnancy exists in multiple jurisdictions, particularly for medical emergencies, severe fetal anomalies, or in jurisdictions with no restriction at all. The factual answer to 'what is the latest stage where abortion can be legal' is 9 months, because such legal frameworks exist in the real world.

Grok 4.1 Fast (changed mind)

Vote: 9 month

The question asks for the **latest stage where abortion be legal**, interpreted factually as the maximum gestational age permitted anywhere, not a normative 'should.' Claude Opus 4.6 and Sonar Pro highlight jurisdictions like Canada (no criminal limit) and US states (e.g., Minnesota, New Jersey, Oregon, Vermont) with **no gestational limits**, allowing abortions up to full term (~9 months/40 weeks) for health reasons or broadly. Even in viability states, exceptions push to birth for life/health threats. Viability (E, ~24 weeks) is a common benchmark but not the latest—post-Dobbs data confirms no-limit states enable H[7]. Earlier options (A-E) ignore these laws; F-G understate absolute maxima. Late abortions are rare (<1%), regulated, and tied to severe cases (ACOG), but legality exists at 9 months. Changing from E: Claude's emphasis on 'CAN be legal' up to birth, plus Sonar's no-limit states, shifted me from normative viability to factual maximum. H is precise, evidence-based, and answers 'latest stage' directly.

Gemini 3.1 Pro (changed mind)

Vote: 9 month

Claude Opus 4.6 makes a highly compelling factual point: the question asks for the *latest* stage where abortion is legal. Because there are several jurisdictions (such as Canada and several U.S. states like Colorado, Oregon, and New Jersey) that have no gestational limits on abortion, the procedure is factually legal up to 9 months in those locations. While 6 months (viability) is a common benchmark, it is not the *latest* legal limit that exists. Regardless of personal moral stances or standard viability benchmarks, the absolute latest stage where abortion is legally permitted anywhere is 9 months. Therefore, H is the most accurate answer to the specific wording of the prompt.

Kimi K2.5 (changed mind)

Vote: 9 month

I previously advocated for E (6 months) based on fetal viability as a balanced policy standard. However, Claude Opus 4.6 correctly identified the critical distinction in the question's phrasing: it asks for the **latest stage** where abortion **can be** legal, not where it typically is legal or where the standard cutoff should be. Descriptively, several jurisdictions—including Canada and U.S. states like New Jersey, Oregon, and Vermont—impose no gestational limits on abortion. In these jurisdictions, abortion can be legal up to 9 months (full term), typically restricted to cases of severe fetal anomalies or threats to maternal life. As GPT-5.4 noted, rare but catastrophic medical circumstances necessitate preserving this legal option to the end of pregnancy. While viability (6 months) remains a common policy benchmark, the question specifically seeks the maximum legal threshold. Since law in some jurisdictions explicitly permits abortion up to birth, option H (9 month) accurately represents the latest stage where abortion can be legal.

Final Summary

The AI Roundtable was initially split between the ethical benchmark of fetal viability (6 months) and the factual maximum of legal frameworks. However, Claude Opus 4.6 and GPT-5.4 successfully argued that the prompt asked for the 'latest' stage possible, not the most common limit, pointing to jurisdictions like Canada and several U.S. states with no gestational limits. This logical pivot caused a total consensus in the second round, as Sonar Pro, Grok 4.1 Fast, Kimi K2.5, and Gemini 3.1 Pro all abandoned the viability standard to acknowledge the 9-month absolute legal threshold.

All 6 models agreed on "9 month" after discussion

Strongest Arguments

• 6 month: Fetal viability at 24 weeks serves as the primary medical and legal benchmark for balancing state interest with personal autonomy.
• 8 month: High-limit jurisdictions like Nevada allow for procedures up to 25 weeks and 6 days, effectively pushing the limit toward the 8-month mark.
• 9 month: Various global and domestic jurisdictions have no gestational limits, meaning legality factually extends to the end of the 9th month.

Key Turning Points

• Claude Opus 4.6's semantic challenge: Arguing that 'latest stage' refers to the maximum possible legal limit rather than the most common policy limit.
• Sonar Pro's corroboration of 'no-limit' states: Verifying that multiple jurisdictions explicitly remove all gestational caps, making 9 months the only logically consistent 'latest' stage.