GPT-6 Sol hits #6 on Agent Arena with +7.7% net improvement at 56% less cost per task
arena · x · 2026-09-26
Agent Arena's new leaderboard puts GPT-6 Sol (Max) at #6 with +7.7% net improvement across 4,000+ real-world agentic sessions, up from #8 for its predecessor. Versus GPT 5.6 Sol (xHigh), it gains 1.5 points of net improvement at half the per-token price, and jumps to #4 on Confirmed Success (+11.4% vs +2.9%).
On the cost-performance Pareto frontier, GPT-6 Sol sits at $0.75 median cost/task — 56% cheaper than Claude Fable 5 (High) at $1.72 — while trailing it by only 0.6 percentage points. The arena measures tool orchestration on long-horizon tasks with web, filesystem, and terminal tools across 2M+ sessions.
More from coding & agent
- Code is eating motion graphics: a full launch video in 20 minutes, ~$40, with Opus 5.5 — cedric_chee · 2026-09-26
- OpenClaw 2.0 Hackathon: Build Your Startup's 'First Hire' Agent, Win a Trip to SF and Mac minis — steipete · 2026-09-26
- Claude Code now wraps up gracefully at the 5-hour cap instead of cutting off mid-task — rudrank · 2026-09-26
- Claude Opus 5.5 generates pixel-art Nyan Cat animation in under 5 minutes — majidmanzarpour · 2026-09-26
- Users iterate on Opus 5.5 pixel-art animations, one plans to turn it into a game — majidmanzarpour · 2026-09-26
- Agent Flow mod visualizes every Claude Code subagent in a live sidebar tree — EricBuess · 2026-09-26