The week on the leaderboard, 28 Sept 2026 to 4 Oct 2026
10 new models, 5 price cuts, 613 new benchmark results. What moved on the BenchLeader Index this week and why.
The week of 28 Sept 2026 to 4 Oct 2026, from 5 daily updates.
Three things that happened
- Biggest faller: MiMo-V2.6-Flash, down 1.7 to 59.1; nothing gained more than half a point.
- 10 new models arrived: Ling 3.1 Flash, Gemini 4 Argon, GPT-6.1 Sol, Mercury Voice, Claude Sonnet 5.5 and more.
- Busiest benchmark: PRBench Finance with 68 new results; 613 new results were published in all.
Index movers
- MiMo-V2.6-Flash-1.7
- Step 5 Preview-1.6
- GPT-5.5 Pro-1.2
- MiMo-V2.6-Pro-1.2
- Muse Spark 1.3-1.0
- Ling 3.0 Flash-1.0
- Claude Fable 5.1-0.9
- GPT-6 Astra-0.9
| Model | Provider | 28 Sept 2026 | 4 Oct 2026 | Change | |---|---|---:|---:|---:| | MiMo-V2.6-Flash | Xiaomi | 60.8 | 59.1 | -1.7 | | Step 5 Preview | StepFun | 64.4 | 62.8 | -1.6 | | GPT-5.5 Pro | OpenAI | 66.8 | 65.6 | -1.2 | | MiMo-V2.6-Pro | Xiaomi | 65.2 | 64.0 | -1.2 | | Muse Spark 1.3 | Meta | 68.8 | 67.8 | -1.0 | | Ling 3.0 Flash | Ant Group | 54.0 | 53.0 | -1.0 | | Claude Fable 5.1 | Anthropic | 69.3 | 68.4 | -0.9 | | GPT-6 Astra | OpenAI | 71.1 | 70.2 | -0.9 | | Claude Opus 5 | Anthropic | 69.3 | 68.4 | -0.9 | | GPT-6 Sol | OpenAI | 67.2 | 66.3 | -0.9 |
New models
- Ling 3.1 Flash (Ant Group) is now listed; no independent results yet. (details)
- Gemini 4 Argon (high) (Google) appeared with 12 benchmark results, entering the BenchLeader Index at #10. (details)
- GPT-6.1 Sol (OpenAI) appeared with 1 benchmark result. (details)
- Mercury Voice (Inception) is now listed at $0.68/M blended; no independent results yet. (details)
- Claude Sonnet 5.5 (Anthropic) appeared with 2 benchmark results. (details)
- Claude Opus 5.5 Range (Anthropic) is now listed; no independent results yet. (details)
- Claude Sonnet 5 Range (Anthropic) is now listed; no independent results yet. (details)
- Resonant 1 (Unknown) is now listed; no independent results yet. (details)
- Daybreak Blue (OpenAI) is now listed at $8.00/M blended; no independent results yet. (details)
- Daybreak Red (OpenAI) is now listed at $28.13/M blended; no independent results yet. (details)
Price changes
- Gemma 3n E4B input price moved from $0.06/M to $0.00/M (100% down).
- Magistral Small input price moved from $0.50/M to $0.15/M (70% down).
- Qwen3.7 Plus output price moved from $3.00/M to $1.60/M (47% down).
- Nemotron 3.5 Lightning input price moved from $0.07/M to $0.06/M (14% down).
- R1 Distill Llama 70B input price moved from $0.80/M to $0.70/M (13% down).
- DeepSeek V4 Pro (max) input price moved from $0.43/M to $0.66/M (52% up).
- MiMo-V2.5-Pro input price moved from $0.52/M to $1.00/M (92% up).
- Muse Glimmer input price moved from $0.30/M to $0.35/M (17% up).
- MiniMax-M1 input price moved from $0.40/M to $0.55/M (38% up).
- gpt-oss-20b (high) input price moved from $0.05/M to $0.07/M (40% up).
- Solar Mini4 input price moved from $0.05/M to $0.10/M (100% up).
- Qwen3.8 27B (xhigh) input price moved from $0.42/M to $0.45/M (7% up).
- GPT-5.6 Sol Pro (max) input price moved from $2.00/M to $4.00/M (100% up).
- Qwen3.5 Flash output price moved from $0.29/M to $0.40/M (39% up).
- Qwen3.7 Flash (no reasoning) output price moved from $0.12/M to $0.13/M (10% up).
Top five as of 11 Oct 2026
- Claude Opus 5.5 — 72.0
- Claude Fable 5.1 — 70.8
- GPT-6 Astra — 70.2
- Claude Opus 5.5 — 70.2
- Gemini 4 Argon — 70.0
Generated from the week's daily updates; every line links to the page where the numbers and their sources can be checked.