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Trajector-SWE-20K open sample: 2,000 sessions
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{
"sessions": 2000,
"tokens_est": 88762685,
"assistant_turns": 77979,
"tool_calls": 78274,
"thinking": {
"blocks": 17227,
"empty": 3377,
"nonempty": 13850,
"empty_rate": 0.196,
"nonempty_per_100_turns": 17.76,
"sessions_no_nonempty_thinking": 712,
"share_sessions_no_thinking": 0.356,
"by_position": {
"last": {
"blocks": 1464,
"empty": 241,
"empty_rate": 0.1646
},
"second_last": {
"blocks": 1200,
"empty": 128,
"empty_rate": 0.1067
},
"3rd_to_5th": {
"blocks": 2792,
"empty": 365,
"empty_rate": 0.1307
},
"earlier": {
"blocks": 11771,
"empty": 2643,
"empty_rate": 0.2245
}
}
},
"models": {
"claude-opus-4-8": {
"sessions": 581,
"tokens_est": 26758514
},
"claude-opus-4-7": {
"sessions": 578,
"tokens_est": 29393109
},
"claude-opus-4-6": {
"sessions": 447,
"tokens_est": 15333795
},
"claude-sonnet-4-6": {
"sessions": 282,
"tokens_est": 12219814
},
"claude-fable-5": {
"sessions": 66,
"tokens_est": 3546436
},
"claude-haiku-4-5": {
"sessions": 46,
"tokens_est": 1511017
}
},
"scale": {
"tokens": {
"median": 29100.5,
"p90": 91515,
"max": 533787,
"mean": 44381.3
},
"n_msgs": {
"median": 36.0,
"p90": 183,
"max": 1726,
"mean": 79.8
},
"n_tool_calls": {
"median": 17.0,
"p90": 93,
"max": 859,
"mean": 39.1
}
},
"token_estimate_note": "chars/4 + CJK_chars/1.5 over released (redacted) messages+system, excluding signature fields"
}