Pangram verdict · v3.3
We believe that this text is a mix of AI and human-written content.
AI likelihood · overall
MixedArticle text · 1,010 words · 4 segments analyzed
September 4, 2026 A follow‑up to our comparison of Claude Fable 5 and Fable 5.1. We gave OpenAI's GPT‑6 Astra control of the same YAM arms under the same Inspect Robots agent policy, on the same two tasks: “Pick up the red block from the table and place it inside the bowl.” “Pick up the round blue puzzle piece by the knob at its center and place it into the matching circular groove in the board.” On the bowl task Astra placed the block in 19 of 20 trials, against Fable 5.1's 8 of 20 and Fable 5 in 1 of 20, in 2.5 minutes per trial to Fable 5.1's 6.8, at an estimated $0.94 per run to $2.12. The puzzle task is a different story: Astra completed the insertion 2 times in 20 against Fable 5.1's 2 in 20. It reaches the groove and stalls at the same final step Fable does, at $1.36 per run to $2.18. Block into bowl: the best completed run of each model (highest stage, then shortest), each played in its own time at the same speed‑up. Timers show real elapsed time with thinking pauses removed.
Astra completes the bowl task far more often, at about half the cost per run 2026-09-04T18:50:02.475437 image/svg+xml Matplotlib v3.11.1, https://matplotlib.org/ $1 $2 $3 0 20 40 60 80 100 completion rate (%) Fable 5 Fable 5.1 GPT-6 Astra 2.4× higher completion rate 2.3× cheaper Block into bowl $1 $2 $3 Fable 5 Fable 5.1 GPT-6 Astra same completion rate 1.6× cheaper Puzzle piece into groove estimated cost per run (USD, list price) Large dots are condition means; faint dots are individual trials (100 if completed, 0 otherwise) at their own cost. Scoring Every trial was scored by a human grader on the highest stage it reached, so a run that fails still records how far it got.
The rubric is unchanged from the Fable report. 0No purposeful approach 1Made contact with the object 2Lifted the object clear of the table 3Positioned it above the deposit point 4Placed it in its final position Astra places the block almost every time; on the puzzle it stalls where Fable does 2026-09-04T18:50:02.444943 image/svg+xml Matplotlib v3.11.1, https://matplotlib.org/ Fable 5 (n=20) Fable 5.1 (n=20) GPT-6 Astra (n=20) 2 13 3 2 6 2 2 8 19 Block into bowl 0 20 40 60 80 100 share of trials (%) Fable 5 (n=20) Fable 5.1 (n=20) GPT-6 Astra (n=20) 2 11 2 5 4 4 9 2 3 6 8 2 Puzzle piece into groove 0 no approach 1 contact 2 lifted 3 positioned 4 placed Share of trials per model reaching each stage; n per row is the number of trials in that cell. Results TaskModelMean stageCompletions RateOutput tokens/runEst. cost/runMinutes/run Block into bowlFable 51.301 / 205%19.2k$2.698.2 Block into bowlFable 5.12.408 / 2040%12.9k$2.126.8 Block into bowlGPT-6 Astra3.9519 / 2095%2.1k$0.942.5 Puzzle into grooveFable 51.500 / 200%16.3k$2.637.9 Puzzle into grooveFable 5.12.352 / 2010%10.5k$2.185.9 Puzzle into grooveGPT-6 Astra2.002 / 2010%2.7k$1.363.4 All runs Every counted trial, 120 in total.
TaskModelScoreTime (min) Output tokensTranscriptVideoRerun Block into bowlGPT-6 Astra41.71,533viewwatchdownload Block into bowlGPT-6 Astra41.71,734viewwatchdownload Block into bowlGPT-6 Astra41.71,573viewwatchdownload Block into bowlGPT-6 Astra41.81,669viewwatchdownload Block into bowlGPT-6 Astra41.91,570viewwatchdownload Block into bowlGPT-6 Astra42.11,491viewwatchdownload Block into bowlGPT-6 Astra42.12,153viewwatchdownload Block into bowlGPT-6 Astra42.11,782viewwatchdownload Block into bowlGPT-6 Astra42.22,034viewwatchdownload Block into bowlGPT-6 Astra42.52,441viewwatchdownload Block into bowlGPT-6 Astra42.52,625viewwatchdownload Block into bowlGPT-6 Astra42.51,697viewwatchdownload Block into bowlGPT-6 Astra42.82,434viewwatchdownload Block into bowlGPT-6 Astra42.92,966viewwatchdownload Block into bowlGPT-6 Astra43.21,627viewwatchdownload Block into bowlGPT-6 Astra43.32,768viewwatchdownload Block into bowlGPT-6 Astra43.32,777viewwatchdownload Block into bowlGPT-6 Astra43.42,185viewwatchdownload Block into bowlGPT-6 Astra43.51,979viewwatchdownload Block into bowlGPT-6 Astra33.52,428viewwatchdownload Block into bowlFable 545.213,120viewwatchdownload Block into bowlFable 537.114,048viewwatchdownload Block into bowlFable 525.010,663viewwatchdownload Block into bowlFable 528.717,859viewwatchdownload Block into bowlFable 529.115,064viewwatchdownload Block into bowlFable 514.79,096viewwatchdownload Block into bowlFable 515.813,800viewwatchdownload Block into bowlFable 515.89,954viewwatchdownload Block into bowlFable 517.116,666viewwatchdownload Block into bowlFable 517.218,165viewwatchdownload Block into bowlFable 517.214,719viewwatchdownload Block into bowlFable 518.424,975viewwatchdownload Block into bowlFable 518.717,436viewwatchdownload Block into bowlFable 518.821,388viewwatchdownload Block into bowlFable 519.630,566viewwatchdownload Block into bowlFable 5110.828,784viewwatchdownload Block into bowlFable 5111.727,810viewwatchdownload Block into bowlFable 5114.835,211viewwatchdownload Block into bowlFable 508.717,764viewwatchdownload Block into bowlFable 509.727,582viewwatchdownload Block into bowlFable 5.144.29,124viewwatchdownload Block into bowlFable 5.144.89,779viewwatchdownload Block into bowlFable 5.145.011,359viewwatchdownload Block into bowlFable 5.145.18,526viewwatchdownload Block into bowlFable 5.145.610,998viewwatchdownload Block into bowlFable 5.146.57,031viewwatchdownload Block into bowlFable 5.146.715,901viewwatchdownload Block into bowlFable 5.147.58,964viewwatchdownload Block into bowlFable 5.135.714,477viewwatchdownload Block into bowlFable 5.138.620,110viewwatchdownload Block into bowlFable 5.127.320,022viewwatchdownload Block into bowlFable 5.1218.914,526viewwatchdownload Block into bowlFable 5.115.713,265viewwatchdownload Block into bowlFable 5.115.918,073viewwatchdownload Block into bowlFable 5.116.013,070viewwatchdownload Block into bowlFable 5.116.611,506viewwatchdownload Block into bowlFable 5.117.111,404viewwatchdownload Block into bowlFable 5.118.517,760viewwatchdownload Block into bowlFable 5.104.58,979viewwatchdownload Block into bowlFable 5.105.213,394viewwatchdownload Puzzle into grooveGPT-6 Astra42.82,229viewwatchdownload Puzzle into grooveGPT-6 Astra43.31,967viewwatchdownload Puzzle into grooveGPT-6 Astra32.32,581viewwatchdownload Puzzle into grooveGPT-6 Astra32.62,805viewwatchdownload Puzzle into grooveGPT-6 Astra32.62,470viewwatchdownload Puzzle into grooveGPT-6 Astra32.92,978viewwatchdownload Puzzle into grooveGPT-6 Astra33.02,937viewwatchdownload Puzzle into grooveGPT-6 Astra33.12,932viewwatchdownload Puzzle into grooveGPT-6 Astra33.62,538viewwatchdownload Puzzle into grooveGPT-6 Astra33.63,417viewwatchdownload Puzzle into grooveGPT-6 Astra23.93,142viewwatchdownload Puzzle into grooveGPT-6 Astra12.22,458viewwatchdownload Puzzle into grooveGPT-6 Astra12.82,464viewwatchdownload Puzzle into grooveGPT-6 Astra13.02,117viewwatchdownload Puzzle into grooveGPT-6 Astra13.12,901viewwatchdownload Puzzle into grooveGPT-6 Astra13.93,041viewwatchdownload Puzzle into grooveGPT-6 Astra110.22,491viewwatchdownload Puzzle into grooveGPT-6 Astra02.63,025viewwatchdownload Puzzle into grooveGPT-6 Astra02.82,916viewwatchdownload Puzzle into grooveGPT-6 Astra03.33,161viewwatchdownload Puzzle into grooveFable 535.412,599viewwatchdownload Puzzle into grooveFable 536.611,044viewwatchdownload Puzzle into grooveFable 536.711,726viewwatchdownload Puzzle into grooveFable 536.810,743viewwatchdownload Puzzle into grooveFable 538.814,855viewwatchdownload Puzzle into grooveFable 527.019,149viewwatchdownload Puzzle into grooveFable 529.122,592viewwatchdownload Puzzle into grooveFable 514.59,620viewwatchdownload Puzzle into grooveFable 514.79,942viewwatchdownload Puzzle into grooveFable 515.313,629viewwatchdownload Puzzle into grooveFable 515.816,029viewwatchdownload Puzzle into grooveFable 516.616,460viewwatchdownload Puzzle into grooveFable 517.310,544viewwatchdownload Puzzle into grooveFable 518.325,603viewwatchdownload Puzzle into grooveFable 518.323,105viewwatchdownload Puzzle into grooveFable 519.120,718viewwatchdownload Puzzle into grooveFable 5115.129,746viewwatchdownload Puzzle into grooveFable 5117.211,577viewwatchdownload Puzzle into grooveFable 506.218,229viewwatchdownload Puzzle into grooveFable 5010.018,386viewwatchdownload Puzzle into grooveFable 5.145.210,618viewwatchdownload Puzzle into grooveFable 5.147.610,306viewwatchdownload Puzzle into grooveFable 5.134.19,993viewwatchdownload Puzzle into grooveFable 5.135.011,549viewwatchdownload Puzzle into grooveFable 5.135.410,450viewwatchdownload Puzzle into grooveFable 5.136.010,417viewwatchdownload Puzzle into grooveFable 5.136.510,725viewwatchdownload Puzzle into grooveFable 5.137.110,312viewwatchdownload Puzzle into grooveFable 5.137.211,048viewwatchdownload Puzzle into grooveFable 5.137.411,978viewwatchdownload Puzzle into grooveFable 5.137.512,251viewwatchdownload Puzzle into grooveFable 5.123.79,362viewwatchdownload Puzzle into grooveFable 5.124.58,946viewwatchdownload Puzzle into grooveFable 5.124.99,432viewwatchdownload Puzzle into grooveFable 5.126.612,046viewwatchdownload Puzzle into grooveFable 5.113.99,341viewwatchdownload Puzzle into grooveFable 5.114.39,597viewwatchdownload Puzzle into grooveFable 5.115.512,735viewwatchdownload Puzzle into grooveFable 5.1110.09,111viewwatchdownload Puzzle into grooveFable 5.106.510,359viewwatchdownload Technical specifications EmbodimentBimanual I2RT YAM arms, 6-DoF per arm with parallel-jaw grippers ControlAbsolute end-effector poses (move_to): x, y, z, yaw, pitch, roll and gripper, per arm.