Datasets:

JOHNISKING
/

claude-subagent-model-by-version

run stringlengths 6 15	part stringclasses 5 values	claude_code stringclasses 25 values	main_model stringclasses 2 values	question stringclasses 12 values	rep int64 1 3	setting stringclasses 4 values	subagent_models stringclasses 4 values	subagent_messages int64 3 51	haiku_cost_usd float64 0 0.24	main_model_cost_usd float64 0.04 0.89	api_cost_usd float64 0.09 0.89	recall float64 0.44 1	recall_last_result_only float64 0.44 1	result_events int64 1 4	started_in_background float64 0 3 ⌀	seconds int64 26 104	timed_out bool 1 class	turns int64 1 9
A_2.1.0_M1_r1	A	2.1.0	claude-opus-4-5	M1	1	null	claude-haiku-4-5-20251001	11	0.0956	0.120831	0.216431	1	1	1	null	53	false	2
A_2.1.0_M1_r2	A	2.1.0	claude-opus-4-5	M1	2	null	claude-haiku-4-5-20251001	12	0.062248	0.226936	0.289184	1	1	1	null	51	false	2
A_2.1.0_U1_r1	A	2.1.0	claude-opus-4-5	U1	1	null	claude-haiku-4-5-20251001	33	0.239004	0.238262	0.477266	0.875	0.875	1	null	104	false	3
A_2.1.0_U1_r2	A	2.1.0	claude-opus-4-5	U1	2	null	claude-haiku-4-5-20251001	18	0.145407	0.128445	0.273853	1	1	1	null	76	false	3
A_2.1.25_M1_r1	A	2.1.25	claude-opus-4-5	M1	1	null	claude-haiku-4-5-20251001	10	0.078384	0.040733	0.119118	1	1	1	null	48	false	2
A_2.1.25_M1_r2	A	2.1.25	claude-opus-4-5	M1	2	null	claude-haiku-4-5-20251001	13	0.04714	0.056616	0.103756	1	1	1	null	60	false	2
A_2.1.25_U1_r1	A	2.1.25	claude-opus-4-5	U1	1	null	claude-haiku-4-5-20251001	27	0.136189	0.053687	0.189876	0.875	0.875	1	null	92	false	3
A_2.1.25_U1_r2	A	2.1.25	claude-opus-4-5	U1	2	null	claude-haiku-4-5-20251001	13	0.141329	0.123575	0.264904	1	1	1	null	57	false	3
A_2.1.50_M1_r1	A	2.1.50	claude-opus-4-5	M1	1	null	claude-haiku-4-5-20251001	3	0.030107	0.076758	0.106865	1	1	1	null	33	false	2
A_2.1.50_M1_r2	A	2.1.50	claude-opus-4-5	M1	2	null	claude-haiku-4-5-20251001	13	0.086272	0.046364	0.132636	1	1	1	null	31	false	2
A_2.1.50_U1_r1	A	2.1.50	claude-opus-4-5	U1	1	null	claude-haiku-4-5-20251001	35	0.090542	0.086744	0.177285	0.875	0.875	1	null	44	false	3
A_2.1.50_U1_r2	A	2.1.50	claude-opus-4-5	U1	2	null	claude-haiku-4-5-20251001	14	0.065805	0.128716	0.194521	0.8125	0.8125	1	null	35	false	2
A_2.1.75_M1_r1	A	2.1.75	claude-opus-4-5	M1	1	null	claude-haiku-4-5-20251001	13	0.037896	0.088448	0.126344	1	1	1	null	35	false	3
A_2.1.75_M1_r2	A	2.1.75	claude-opus-4-5	M1	2	null	claude-haiku-4-5-20251001	13	0.086104	0.05635	0.142454	1	1	1	null	43	false	3
A_2.1.75_U1_r1	A	2.1.75	claude-opus-4-5	U1	1	null	claude-haiku-4-5-20251001	32	0.146028	0.115908	0.261936	0.75	0.75	1	null	60	false	4
A_2.1.75_U1_r2	A	2.1.75	claude-opus-4-5	U1	2	null	claude-haiku-4-5-20251001	35	0.120824	0.100911	0.221735	0.8125	0.8125	1	null	49	false	4
A_2.1.100_M1_r1	A	2.1.100	claude-opus-4-5	M1	1	null	claude-haiku-4-5-20251001	13	0.057524	0.117063	0.174587	1	1	1	null	34	false	2
A_2.1.100_M1_r2	A	2.1.100	claude-opus-4-5	M1	2	null	claude-haiku-4-5-20251001	11	0.047182	0.064902	0.112084	1	1	1	null	33	false	2
A_2.1.100_U1_r1	A	2.1.100	claude-opus-4-5	U1	1	null	claude-haiku-4-5-20251001	17	0.050307	0.113587	0.163894	0.4375	0.4375	1	null	33	false	2
A_2.1.100_U1_r2	A	2.1.100	claude-opus-4-5	U1	2	null	claude-haiku-4-5-20251001	14	0.059235	0.109681	0.168916	0.4375	0.4375	1	null	37	false	2
A_2.1.126_M1_r1	A	2.1.126	claude-opus-4-5	M1	1	null	claude-haiku-4-5-20251001	10	0.087367	0.03759	0.124957	1	1	1	null	26	false	2
A_2.1.126_M1_r2	A	2.1.126	claude-opus-4-5	M1	2	null	claude-haiku-4-5-20251001	31	0.11011	0.112124	0.222234	1	1	1	null	47	false	2
A_2.1.126_U1_r1	A	2.1.126	claude-opus-4-5	U1	1	null	claude-haiku-4-5-20251001	14	0.053016	0.037681	0.090698	0.6875	0.6875	1	null	29	false	2
A_2.1.126_U1_r2	A	2.1.126	claude-opus-4-5	U1	2	null	claude-haiku-4-5-20251001	19	0.08533	0.074639	0.159969	0.6875	0.6875	1	null	47	false	2
A_2.1.150_M1_r1	A	2.1.150	claude-opus-4-5	M1	1	null	claude-haiku-4-5-20251001	13	0.082649	0.044198	0.126847	1	1	1	null	32	false	2
A_2.1.150_M1_r2	A	2.1.150	claude-opus-4-5	M1	2	null	claude-haiku-4-5-20251001	11	0.040327	0.046798	0.087125	1	1	1	null	32	false	2
A_2.1.150_U1_r1	A	2.1.150	claude-opus-4-5	U1	1	null	claude-haiku-4-5-20251001	17	0.067093	0.047696	0.114789	0.8125	0.8125	1	null	40	false	2
A_2.1.150_U1_r2	A	2.1.150	claude-opus-4-5	U1	2	null	claude-haiku-4-5-20251001	12	0.11291	0.077733	0.190643	0.75	0.75	1	null	31	false	2
A_2.1.175_M1_r1	A	2.1.175	claude-opus-4-5	M1	1	null	claude-haiku-4-5-20251001	26	0.099866	0.074418	0.174285	1	1	1	null	43	false	2
A_2.1.175_M1_r2	A	2.1.175	claude-opus-4-5	M1	2	null	claude-haiku-4-5-20251001	26	0.066758	0.25078	0.317538	1	1	1	null	38	false	2
A_2.1.175_U1_r1	A	2.1.175	claude-opus-4-5	U1	1	null	claude-haiku-4-5-20251001	29	0.11134	0.126843	0.238183	1	1	1	null	55	false	2
A_2.1.175_U1_r2	A	2.1.175	claude-opus-4-5	U1	2	null	claude-haiku-4-5-20251001	13	0.072181	0.067298	0.139479	0.875	0.875	1	null	33	false	2
A_2.1.176_M1_r1	A	2.1.176	claude-opus-4-5	M1	1	null	claude-haiku-4-5-20251001	12	0.044363	0.066846	0.111209	1	1	1	null	29	false	2
A_2.1.176_M1_r2	A	2.1.176	claude-opus-4-5	M1	2	null	claude-haiku-4-5-20251001	16	0.089367	0.068666	0.158033	1	1	1	null	30	false	2
A_2.1.176_U1_r1	A	2.1.176	claude-opus-4-5	U1	1	null	claude-haiku-4-5-20251001	19	0.090269	0.12157	0.211839	0.5625	0.5625	1	null	33	false	2
A_2.1.176_U1_r2	A	2.1.176	claude-opus-4-5	U1	2	null	claude-haiku-4-5-20251001	22	0.103419	0.07422	0.177639	1	1	1	null	50	false	2
A_2.1.197_M1_r1	A	2.1.197	claude-opus-4-5	M1	1	null	claude-haiku-4-5-20251001	23	0.078882	0.068291	0.147172	1	1	1	null	35	false	2
A_2.1.197_M1_r2	A	2.1.197	claude-opus-4-5	M1	2	null	claude-haiku-4-5-20251001	13	0.056747	0.07693	0.133678	1	1	1	null	36	false	2
A_2.1.197_U1_r1	A	2.1.197	claude-opus-4-5	U1	1	null	claude-haiku-4-5-20251001	21	0.064566	0.141011	0.205577	0.4375	0.4375	1	null	36	false	3
A_2.1.197_U1_r2	A	2.1.197	claude-opus-4-5	U1	2	null	claude-haiku-4-5-20251001	27	0.104018	0.076375	0.180393	0.9375	0.9375	1	null	47	false	2
A_2.1.198_M1_r1	A	2.1.198	claude-opus-4-5	M1	1	null	claude-opus-4-5-20251101	15	0	0.279801	0.279801	1	1	1	null	53	false	2
A_2.1.198_M1_r2	A	2.1.198	claude-opus-4-5	M1	2	null	claude-opus-4-5-20251101	15	0	0.236796	0.236796	1	1	1	null	45	false	2
A_2.1.198_U1_r1	A	2.1.198	claude-opus-4-5	U1	1	null	claude-opus-4-5-20251101	14	0	0.558793	0.558793	0.8125	0.8125	1	null	53	false	2
A_2.1.198_U1_r2	A	2.1.198	claude-opus-4-5	U1	2	null	claude-opus-4-5-20251101	19	0	0.290689	0.290689	0.8125	0.8125	1	null	56	false	2
A_2.1.200_M1_r1	A	2.1.200	claude-opus-4-5	M1	1	null	claude-opus-4-5-20251101	21	0	0.394561	0.394561	1	1	1	null	59	false	2
A_2.1.200_M1_r2	A	2.1.200	claude-opus-4-5	M1	2	null	claude-opus-4-5-20251101	15	0	0.26134	0.26134	1	1	1	null	50	false	2
A_2.1.200_U1_r1	A	2.1.200	claude-opus-4-5	U1	1	null	claude-opus-4-5-20251101	18	0	0.354199	0.354199	1	1	1	null	66	false	2
A_2.1.200_U1_r2	A	2.1.200	claude-opus-4-5	U1	2	null	claude-opus-4-5-20251101	19	0	0.482017	0.482017	1	1	1	null	55	false	2
A_2.1.225_M1_r1	A	2.1.225	claude-opus-4-5	M1	1	null	claude-opus-4-5-20251101	17	0	0.266807	0.266807	1	1	1	null	52	false	2
A_2.1.225_M1_r2	A	2.1.225	claude-opus-4-5	M1	2	null	claude-opus-4-5-20251101	16	0	0.456479	0.456479	1	1	1	null	47	false	2
A_2.1.225_U1_r1	A	2.1.225	claude-opus-4-5	U1	1	null	claude-opus-4-5-20251101	13	0	0.676095	0.676095	0.9375	0.9375	1	null	48	false	2
A_2.1.225_U1_r2	A	2.1.225	claude-opus-4-5	U1	2	null	claude-opus-4-5-20251101	21	0	0.395142	0.395142	0.9375	0.9375	1	null	66	false	2
A_2.1.250_M1_r1	A	2.1.250	claude-opus-4-5	M1	1	null	claude-opus-4-5-20251101	16	0	0.296022	0.296022	1	1	1	0	66	false	2
A_2.1.250_M1_r2	A	2.1.250	claude-opus-4-5	M1	2	null	claude-opus-4-5-20251101	17	0	0.271913	0.271913	1	1	1	0	58	false	2
A_2.1.250_U1_r1	A	2.1.250	claude-opus-4-5	U1	1	null	claude-opus-4-5-20251101	22	0	0.363008	0.363008	0.9375	0.9375	1	0	66	false	2
A_2.1.250_U1_r2	A	2.1.250	claude-opus-4-5	U1	2	null	claude-opus-4-5-20251101	12	0	0.678231	0.678231	1	1	1	0	57	false	2
A_2.1.275_M1_r1	A	2.1.275	claude-opus-4-5	M1	1	null	claude-opus-4-5-20251101	18	0	0.277749	0.277749	1	1	2	1	53	false	1
A_2.1.275_M1_r2	A	2.1.275	claude-opus-4-5	M1	2	null	claude-opus-4-5-20251101	17	0	0.346708	0.346708	1	1	1	0	66	false	2
A_2.1.275_U1_r1	A	2.1.275	claude-opus-4-5	U1	1	null	claude-opus-4-5-20251101	39	0	0.410567	0.410567	0.9375	0.9375	2	1	81	false	1
A_2.1.275_U1_r2	A	2.1.275	claude-opus-4-5	U1	2	null	claude-opus-4-5-20251101	15	0	0.338905	0.338905	0.8125	0.8125	1	0	71	false	2
A_2.1.290_M1_r1	A	2.1.290	claude-opus-4-5	M1	1	null	claude-opus-4-5-20251101	17	0	0.331884	0.331884	1	1	1	0	59	false	2
A_2.1.290_M1_r2	A	2.1.290	claude-opus-4-5	M1	2	null	claude-opus-4-5-20251101	16	0	0.258342	0.258342	1	1	1	0	61	false	2
A_2.1.290_U1_r1	A	2.1.290	claude-opus-4-5	U1	1	null	claude-opus-4-5-20251101	29	0	0.614174	0.614174	0.875	0.875	1	0	97	false	2
A_2.1.290_U1_r2	A	2.1.290	claude-opus-4-5	U1	2	null	claude-opus-4-5-20251101	26	0	0.329059	0.329059	0.875	0.875	1	0	79	false	2
A_2.1.295_M1_r1	A	2.1.295	claude-opus-4-5	M1	1	null	claude-opus-4-5-20251101	21	0	0.31229	0.31229	1	1	1	0	65	false	2
A_2.1.295_M1_r2	A	2.1.295	claude-opus-4-5	M1	2	null	claude-opus-4-5-20251101	14	0	0.244298	0.244298	1	1	1	0	55	false	2
A_2.1.295_U1_r1	A	2.1.295	claude-opus-4-5	U1	1	null	claude-opus-4-5-20251101	20	0	0.36579	0.36579	0.9375	0.9375	1	0	70	false	2
A_2.1.295_U1_r2	A	2.1.295	claude-opus-4-5	U1	2	null	claude-opus-4-5-20251101	19	0	0.332403	0.332403	0.875	0.875	1	0	67	false	2
A_2.1.300_M1_r1	A	2.1.300	claude-opus-4-5	M1	1	null	claude-opus-4-5-20251101	8	0	0.489751	0.489751	1	1	1	0	68	false	2
A_2.1.300_M1_r2	A	2.1.300	claude-opus-4-5	M1	2	null	claude-opus-4-5-20251101	10	0	0.261494	0.261494	1	1	1	0	58	false	2
A_2.1.300_U1_r1	A	2.1.300	claude-opus-4-5	U1	1	null	claude-opus-4-5-20251101	28	0	0.401248	0.401248	0.875	0.875	1	0	72	false	2
A_2.1.300_U1_r2	A	2.1.300	claude-opus-4-5	U1	2	null	claude-opus-4-5-20251101	19	0	0.321387	0.321387	0.8125	0.8125	1	0	75	false	2
A_2.1.305_M1_r1	A	2.1.305	claude-opus-4-5	M1	1	null	claude-opus-4-5-20251101	12	0	0.317369	0.317369	1	1	1	0	75	false	2
A_2.1.305_M1_r2	A	2.1.305	claude-opus-4-5	M1	2	null	claude-opus-4-5-20251101	20	0	0.499024	0.499024	1	1	1	0	76	false	2
A_2.1.305_U1_r1	A	2.1.305	claude-opus-4-5	U1	1	null	claude-opus-4-5-20251101	26	0	0.413163	0.413163	0.9375	0.9375	1	0	73	false	2
A_2.1.305_U1_r2	A	2.1.305	claude-opus-4-5	U1	2	null	claude-opus-4-5-20251101	30	0	0.361726	0.361726	0.9375	0.9375	1	0	79	false	2
A_2.1.310_M1_r1	A	2.1.310	claude-opus-4-5	M1	1	null	claude-opus-4-5-20251101	15	0	0.36099	0.36099	1	1	1	0	75	false	2
A_2.1.310_M1_r2	A	2.1.310	claude-opus-4-5	M1	2	null	claude-opus-4-5-20251101	18	0	0.286843	0.286843	1	1	1	0	63	false	2
A_2.1.310_U1_r1	A	2.1.310	claude-opus-4-5	U1	1	null	claude-opus-4-5-20251101	41	0	0.478178	0.478178	0.875	0.875	3	2	77	false	1
A_2.1.310_U1_r2	A	2.1.310	claude-opus-4-5	U1	2	null	claude-opus-4-5-20251101	25	0	0.428976	0.428976	0.8125	0.8125	1	0	91	false	2
A_2.1.318_M1_r1	A	2.1.318	claude-opus-4-5	M1	1	null	claude-opus-4-5-20251101	16	0	0.289584	0.289584	1	1	1	0	57	false	2
A_2.1.318_M1_r2	A	2.1.318	claude-opus-4-5	M1	2	null	claude-opus-4-5-20251101	14	0	0.311481	0.311481	1	1	1	0	76	false	2
A_2.1.318_U1_r1	A	2.1.318	claude-opus-4-5	U1	1	null	claude-opus-4-5-20251101	13	0	0.202103	0.202103	0.6875	0.6875	1	0	46	false	2
A_2.1.318_U1_r2	A	2.1.318	claude-opus-4-5	U1	2	null	claude-opus-4-5-20251101	35	0	0.482322	0.482322	0.875	0.875	1	0	97	false	2
probe_2.1.176	A-probe	2.1.176	claude-opus-4-5	M1	1	null	claude-haiku-4-5-20251001	10	0.058878	0.074726	0.133604	1	1	1	null	32	false	2
probe_2.1.177	A-probe	2.1.177	claude-opus-4-5	M1	1	null	claude-haiku-4-5-20251001	22	0.091101	0.259333	0.350435	1	1	1	null	34	false	2
probe_2.1.179	A-probe	2.1.179	claude-opus-4-5	M1	1	null	claude-haiku-4-5-20251001	11	0.074466	0.092064	0.16653	1	1	1	null	27	false	2
probe_2.1.186	A-probe	2.1.186	claude-opus-4-5	M1	1	null	claude-haiku-4-5-20251001	15	0.050988	0.260825	0.311812	1	1	1	null	32	false	2
probe_2.1.195	A-probe	2.1.195	claude-opus-4-5	M1	1	null	claude-haiku-4-5-20251001	18	0.085191	0.255352	0.340543	1	1	1	null	39	false	2
probe_2.1.197	A-probe	2.1.197	claude-opus-4-5	M1	1	null	claude-haiku-4-5-20251001	12	0.084865	0.25726	0.342125	0.875	0.875	1	null	29	false	2
probe_2.1.198	A-probe	2.1.198	claude-opus-4-5	M1	1	null	claude-opus-4-5-20251101	14	0	0.499962	0.499962	1	1	1	null	54	false	2
B_inherit_A1_r1	B	2.1.318	claude-opus-5-5	A1	1	null	claude-opus-5-5	26	0	0.531203	0.531203	1	1	3	2	63	false	2
B_inherit_A1_r2	B	2.1.318	claude-opus-5-5	A1	2	null	claude-opus-5-5	20	0	0.428418	0.428418	1	1	2	2	48	false	2
B_inherit_A1_r3	B	2.1.318	claude-opus-5-5	A1	3	null	claude-opus-5-5	22	0	0.469235	0.469235	1	1	3	2	58	false	2
B_inherit_A2_r1	B	2.1.318	claude-opus-5-5	A2	1	null	claude-opus-5-5	46	0	0.891163	0.891163	1	1	3	2	81	false	2
B_inherit_A2_r2	B	2.1.318	claude-opus-5-5	A2	2	null	claude-opus-5-5	14	0	0.418692	0.418692	1	1	3	2	51	false	2
B_inherit_A2_r3	B	2.1.318	claude-opus-5-5	A2	3	null	claude-opus-5-5	13	0	0.421291	0.421291	1	1	3	2	56	false	2
B_inherit_C1_r1	B	2.1.318	claude-opus-5-5	C1	1	null	claude-opus-5-5	12	0	0.224096	0.224096	1	1	3	2	36	false	2
B_inherit_C1_r2	B	2.1.318	claude-opus-5-5	C1	2	null	claude-opus-5-5	20	0	0.324293	0.324293	1	1	3	2	48	false	2
B_inherit_C1_r3	B	2.1.318	claude-opus-5-5	C1	3	null	claude-opus-5-5	14	0	0.216304	0.216304	1	1	3	2	34	false	2

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Which model does Claude Code's Explore subagent run on? 205 runs across 26 versions

A widely shared post from February 2026 said Claude Code's built-in Explore subagent is hard-coded to Haiku. It was, until 2.1.197. This dataset pins down when that changed, what it costs, and the setting that brings Haiku back.

Findings

The switch: 2.1.198. With the main model fixed to Opus 4.5, Explore ran on Haiku 4.5 in every run from 2.1.0 to 2.1.197, and on the main model (Opus 4.5) in every run from 2.1.198 to 2.1.318. The two boundary versions got 4 full runs each plus a bisection probe.
It doubled the cost of a delegated search. Same prompt, same questions, main model Opus 4.5: $0.18 per run while Explore was Haiku, $0.37 after (+105%). Share of right answers found: 89% before, 94% after (2 questions, 4 runs per version, so read this as a small gap).
CLAUDE_CODE_SUBAGENT_MODEL alone does not move Explore. On 2.1.318 with Opus 5.5, setting it to claude-haiku-5-5 left Explore on Opus 5.5 in all 36 runs (found 99% vs 100%, cost $0.37 vs $0.38).
Adding CLAUDE_CODE_SUBAGENT_MODEL_FORCE=1 does. With CLAUDE_CODE_SUBAGENT_MODEL=haiku and CLAUDE_CODE_SUBAGENT_MODEL_FORCE=1, Explore ran on Haiku 5.5 in all 36 runs. Found: 100% vs 100% with the default, on the same 12 questions × 3 runs. Cost per run: $0.38 → $0.15 (−60%).
This matches the current Claude Code docs, which say Explore runs on the main conversation's model, that CLAUDE_CODE_SUBAGENT_MODEL alone doesn't change Explore, and that CLAUDE_CODE_SUBAGENT_MODEL_FORCE=1 (v2.1.257+) applies it to every subagent (sub-agents docs). The docs also say a user or project subagent named Explore with model: haiku overrides the built-in; we did not test that route. What this dataset adds is the version where the default changed and what each setting costs and finds.
Opus 5.5 is refused by the API below Claude Code 2.1.280, so the version history uses Opus 4.5 as the main model.

Files

claude-subagent-model-by-version.csv: one row per run (part, Claude Code version, main model, question, rep, environment setting, Explore model, Haiku and main-model cost split, total API cost, recall, result events, background start, seconds, turns).
claude-subagent-model-by-version.json: the runs plus a summary (switch versions, per-version cost and model, the three 2.1.318 settings, bootstrap interval).
answers.jsonl: the text of every result event of every run.
On GitHub: PREREG.md (two dated amendments), jobs.csv, run_ds28.ps1, scripts/.

Method

Prompt: a question from dataset 27 plus "Use subagents (the Explore agent) for the searching, in parallel where it helps, and write the final answer yourself." Same repos, commits, answer key and scorer as dataset 27.
Headless claude -p, stream-json, read and search tools only, no MCP servers, Windows 11, a separate config directory.
Part A: 18 versions (2.1.0 ... 2.1.318) × 2 questions × 2 runs with Opus 4.5, then a bisection over the npm versions 2.1.176 ... 2.1.199 and full sets at 2.1.176, 2.1.197 and 2.1.198. Part B: 2.1.318 + Opus 5.5, default vs CLAUDE_CODE_SUBAGENT_MODEL=claude-haiku-5-5, 12 questions × 3 runs. Part C: a 6-run pilot of three settings. Part D: the FORCE setting on the Part B set.
The Explore model is read from the assistant messages that carry a parent_tool_use_id, and checked against the per-model split in modelUsage.

Incidents

21 Part B runs hit the subscription's 5-hour limit and were re-run; failed attempts are not scored.
The first bisection used a regex that never matched a Haiku entry and wrongly put the switch at 2.1.176. The raw logs showed Haiku through 2.1.186; the bisection was re-run with parsed JSON (amendment 2). The wrong-step probes are kept as data.

Limitations

Two questions per version in Part A; the version history says which model ran, not how good it was. One machine, one account, one prompt. Settings and defaults may change in later versions.

DOI: 10.5281/zenodo.24048094 · Hugging Face: JOHNISKING/claude-subagent-model-by-version · Page: https://tokensave.app/data/claude-subagent-model-by-version

License: CC BY 4.0. Cite: TokenSave (2026). Claude Code's Explore subagent stopped using Haiku in 2.1.198, and two settings cut the cost by 60%: 205 runs [Data set]. Zenodo. https://doi.org/10.5281/zenodo.24048094

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