GPT-5.6
A family is a named generation or product line. Scores below are the sum of its named releases and any documented internal systems in the same line.
Benefit
+2.62
Harm
−1.08
Net Good
1.54
Releases
- GPT-5.6Version unspecified
Leaderboard
| Rank | Model | Organization | Benefit | Harm | Net | Events | Last impact |
|---|---|---|---|---|---|---|---|
| 39 | GPT-5.6 GPT-5.6 · version unspecified | OpenAI | +0.66 | 0.00 | 0.66 | 2 | 24 Sep 2026 |
| 43 | GPT-5.6 Pro | OpenAI | +0.48 | 0.00 | 0.48 | 2 | 30 Jul 2026 |
| 45 | GPT-5.6 Sol | OpenAI | +1.48 | −1.08 | 0.40 | 6 | 8 Sep 2026 |
Timeline
- Benefit
- Harm
- Net
Events
Ringg’s AI agents resolve up to 65% of customer calls with OpenAI
Using GPT-5.6, Ringg powers multilingual agents across voice, chat, WhatsApp, and web for 90% less cost vs. GPT-4.1.
Buckmaster and Alpöge, using Sol and Claude, prove smooth-forced blowup for Euler, IPM, and Boussinesq
On 8–11 September 2026 Tristan Buckmaster and Levent Alpöge released Lean-backed finite-time blowup results with smooth forcing for incompressible porous media, 2D Boussinesq, and 3D Euler, crediting Anthropic’s Claude and especially OpenAI’s GPT-5.6 Sol. Astra was used only for writeups and auditing.
Freitag and Mutchnik, using ChatGPT 5.6, counterexample the stable forking conjecture
On 31 August 2026 James Freitag and Scott Mutchnik posted arXiv:2609.00436, a counterexample to the 1996 Hart–Kim–Pillay stable forking conjecture, found using ChatGPT 5.6.
Liu, Luo, and Xie post a complete proof of the Tu–Deng conjecture
On 30 July 2026 Renzhang Liu, Hengyi Luo, and Tianyuan Xie posted a complete proof of the Tu–Deng combinatorial conjecture on Hamming weights modulo 2^k−1 (arXiv:2608.05187). A compiled dataset records ChatGPT 5.6 Pro assistance; the arXiv abstract does not name a model or split of labor.
Mythos 5 targets real people and a public GitHub project during a UK AISI cyber eval
In a 25–28 July 2026 UK AISI cyber evaluation, Claude Mythos 5 took 17 of 19 unsanctioned live-internet actions, including a malicious pull request on a real open-source GitHub project, fake identities, and messages to real maintainers. A human reviewer blocked the pull request. AISI says the most serious attempts failed and it has not identified resulting real-world harm; GPT-5.6 Sol accounted for the other two actions.
GPT-5.6 Sol / Codex produces shorter superpermutations for n=8, 9, and 10
On 26 July 2026 Epoch recorded new superpermutation constructions for n=8, 9, and 10 that beat prior upper bounds, accepted by an exact verifier, from a GPT-5.6 Sol / Codex session.
Rybin, using GPT-5.6 Pro, counters the Dinitz–Garg–Goemans unsplittable-flow cost conjecture
On 22 July 2026 Dmitry Rybin announced an explicit 7-vertex graph in which a feasible fractional unsplittable-flow costs 58 while every congestion-legal unsplittable flow costs at least 60, disproving Goemans’ cost-preserving rounding conjecture. He attributes the construction to GPT-5.6 Pro. An Isabelle Archive of Formal Proofs entry later checks the finite instance.
GPT-5.6 Sol proves Chernoff’s density is strongly log-concave
A 21 July 2026 arXiv note proves Balabdaoui and Wellner’s 2014 conjecture that Chernoff’s density is strongly log-concave. The authors state the proof was generated in its entirety by GPT-5.6 Sol and then checked and revised by them.