GPT-6.1 Terra added, Claude Fable 5.1 up to #2 (27 Oct 2026)

BenchLeader refreshed 1631 models from 24 of 24 data feeds (benchmark publishers, aggregators and price lists). 1 new model, 5 top-10 rank changes, 158 price changes, 19 new or updated benchmark results across 24 data feeds.

New models

GPT-6.1 Terra (OpenAI) appeared with 2 benchmark results. (details)

Movement in the top 10

Claude Fable 5.1 (max) moved from #4 to #2 in the BenchLeader Index. (details)
GPT-6 Astra (max) moved from #5 to #4 in the BenchLeader Index. (details)
Claude Opus 5.5 (xhigh) moved from #6 to #5 in the BenchLeader Index. (details)
GPT-6.1 Sol (max) moved from #7 to #6 in the BenchLeader Index. (details)
Gemini 4 Argon (high) moved from #2 to #7 in the BenchLeader Index. (details)

Price changes

Muse Wonder (max) cost per task moved from $8.63/M to $3.27/M (62% down). (details)
Muse Spark 1.3 (max) cost per task moved from $3.69/M to $1.31/M (64% down). (details)
Muse Spark 1.3 (xhigh) cost per task moved from $2.15/M to $1.12/M (48% down). (details)
GLM 5.3 (max) cached input price moved from $0.26/M to $0.30/M (15% up). (details)
Qwen3.8 Max (max) cached input price moved from $0.22/M to $0.25/M (13% up). (details)
Muse Spark 1.2 (xhigh) cost per task moved from $1.29/M to $0.81/M (37% down). (details)
GLM 5.2 (max) cached input price moved from $0.26/M to $0.30/M (15% up). (details)
GLM 5.3 Flash cached input price moved from $0.030/M to $0.034/M (15% up). (details)
Muse Spark 1.1 (xhigh) cost per task moved from $1.69/M to $1.13/M (33% down). (details)
Qwen3.7 (max) cached input price moved from $0.33/M to $0.50/M (52% up). (details)
GLM-5 (thinking) cached input price moved from $0.20/M to $0.15/M (25% down). (details)
Qwen3.6 Plus cached input price moved from $0.028/M to $0.050/M (81% up). (details)
Qwen3.7 Plus cached input price moved from $0.055/M to $0.080/M (45% up). (details)
Qwen3.5 Plus (thinking) input price moved from $0.12/M to $0.40/M (248% up). (details)
Qwen3.5 Plus (thinking) output price moved from $0.69/M to $2.40/M (249% up). (details)
GLM 5.1 (thinking) cached input price moved from $0.26/M to $0.19/M (25% down). (details)
GLM 5.1 input price moved from $1.40/M to $0.90/M (36% down). (details)
GLM 5.1 output price moved from $4.40/M to $3.59/M (19% down). (details)
GLM 5.1 cached input price moved from $0.26/M to $0.19/M (25% down). (details)
GLM 5V Turbo input price moved from $1.20/M to $0.75/M (38% down). (details)
GLM 5V Turbo output price moved from $4.00/M to $3.29/M (18% down). (details)
GLM 5V Turbo cached input price moved from $0.24/M to $0.18/M (25% down). (details)
GLM 5.3 (low) cached input price moved from $0.26/M to $0.30/M (15% up). (details)
GLM-5 input price moved from $1.00/M to $0.60/M (40% down). (details)
GLM-5 output price moved from $3.20/M to $2.69/M (16% down). (details)
GLM-5 cached input price moved from $0.20/M to $0.15/M (25% down). (details)
GLM 5.3 Flash (max) cached input price moved from $0.030/M to $0.034/M (15% up). (details)
GLM 5V Turbo (thinking) input price moved from $1.20/M to $0.75/M (38% down). (details)
GLM 5V Turbo (thinking) output price moved from $4.00/M to $3.29/M (18% down). (details)
GLM 5V Turbo (thinking) cached input price moved from $0.24/M to $0.18/M (25% down). (details)
…and 128 more.

New benchmark results

Terminal-Bench-Science 0.1 (AA): 8 new results, including GPT-6 Astra, Claude Fable 5.1, Claude Fable 5.1… (board)
Terminal-Bench Science: 2 new results, including DeepSeek V4.1 Flash, Kimi K3.1 Pro (board)
AA-Briefcase v1.1: 2 new results, including Qwen3.7 Plus, Ling 3.1 Flash (board)
Terminal-Bench 2.1 (Vals): 1 new result, including Gemini 4 Argon (board)
MultiChallenge: 1 new result, including DeepSeek V4.1 Flash 1017 (board)
FORTRESS: 1 new result, including DeepSeek V4.1 Flash 1017 (board)
IOI: 1 new result, including Kimi K3.1 Pro (board)
BioMysteryBench: 1 new result, including Kimi K3.1 Pro (board)
MysteryMechanism: 1 new result, including Kimi K3.1 Pro (board)
Vals Science Index: 1 new result, including Kimi K3.1 Pro (board)

Speed changes

Claude Opus 5.5 time to first answer changed from 109.62 s to 157.49 s. (details)
Claude Opus 5.5 response time changed from 115.71 s to 163.59 s. (details)
GPT-5.5 time to first answer changed from 30.26 s to 15.95 s. (details)
GPT-5.5 response time changed from 36.31 s to 21.82 s. (details)
GPT-5.5 Pro output speed changed from 20 tok/s to 27 tok/s. (details)
GPT-5.5 Pro time to first token changed from 5.46 s to 7.93 s. (details)
Claude Opus 4.7 time to first token changed from 0.78 s to 1.22 s. (details)
Qwen3.8 Max time to first token changed from 6.86 s to 2.30 s. (details)
GPT-5.6 Terra time to first answer changed from 29.58 s to 16.82 s. (details)
GPT-5.6 Terra response time changed from 33.69 s to 21.30 s. (details)
Qwen3.8 2.4T A95B time to first token changed from 0.81 s to 1.42 s. (details)
Claude Sonnet 5 time to first answer changed from 14.13 s to 9.18 s. (details)
GPT-5.6 Luna time to first token changed from 1.20 s to 1.71 s. (details)
Grok 4.20 Multi-Agent time to first token changed from 18.42 s to 5.48 s. (details)
Claude Sonnet 5.5 time to first answer changed from 1.49 s to 2.99 s. (details)
…and 65 more.

Today's top five

More: New AI model releases this week, and the full LLM leaderboard 2026.

This digest is generated automatically from the day's data changes. Every line links to the page where you can check the numbers and their source.