LLM Pareto Frontier — edition 2026-09
Living report · updated monthly · last updated
Edition: 2026-09 — archived snapshot, see the latest edition
Archived snapshot of the LLM Pareto Frontier living report, as published on 2026-09-22. Data: Artificial Analysis model pages, Intelligence Index and vendor list prices, fetched 2026-09-22.
Frontier this edition: GLM-5.3-Flash → MiMo-V2.6-Pro → GPT-5.6 Sol → Claude Opus 5 → GPT-6 Astra → Claude Fable 5.1.
| Model | AA Index | Input $/M | Output $/M | Weights | Pareto-efficient |
|---|---|---|---|---|---|
| GPT-6 Astra | 53 | $10.00 | $50.00 | closed | ✓ |
| Claude Fable 5.1 | 53 | $10.00 | $50.00 | closed | ✓ |
| Claude Opus 5 | 51 | $5.00 | $25.00 | closed | ✓ |
| Claude Fable 5 | 50 | $10.00 | $50.00 | closed | dominated by GPT-6 Astra |
| GPT-5.6 Sol | 47 | $4.00 | $20.00 | closed | ✓ |
| MiMo-V2.6-Pro | 46 | $0.43 | $0.87 | open | ✓ |
| GLM 5.3 | 45 | $1.40 | $4.40 | open | dominated by MiMo-V2.6-Pro |
| Qwen3.8 Max | 45 | $2.00 | $6.00 | open | matched by GLM 5.3 at 1.4× less |
| Kimi K3 | 44 | $3.00 | $15.00 | open | dominated by MiMo-V2.6-Pro |
| GLM-5.3-Flash | 42 | $0.15 | $0.50 | open | ✓ |
| Opus 4.8 | 42 | $5.00 | $25.00 | closed | matched by GLM-5.3-Flash at 50.0× less |
| DeepSeek V4.1 Flash | 39 | $0.30 | $1.20 | open | dominated by MiMo-V2.6-Pro |
| GPT-5.4 | 39 | $2.50 | $15.00 | closed | matched by DeepSeek V4.1 Flash at 12.5× less |
| Sonnet 5 | 38 | $2.00 | $10.00 | closed | dominated by MiMo-V2.6-Pro |
| GPT-5.5 | 38 | $5.00 | $30.00 | closed | matched by Sonnet 5 at 3.0× less |
| DeepSeek V4 Flash | 34 | $0.44 | $1.32 | open | dominated by MiMo-V2.6-Pro |
| GLM 5.2 | 34 | $1.40 | $4.40 | open | matched by DeepSeek V4 Flash at 3.3× less |
| Gemini 3.5 Flash | 33 | $1.50 | $9.00 | closed | dominated by MiMo-V2.6-Pro |
| MiniMax M3 | 29 | $0.30 | $1.20 | open | dominated by MiMo-V2.6-Pro |
| Kimi K2.6 | 27 | $0.95 | $4.00 | open | dominated by MiMo-V2.6-Pro |
| Kimi K2.7 | 26 | $0.95 | $4.00 | open | dominated by MiMo-V2.6-Pro |