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        "raw_text": "The opponent's last offer gives me 0.790, which is above the expert's recommended target of 0.764. Since 0.790 > 0.764 and well above my BATNA of 0.380, I should accept this offer.\n\n{\"target_utility\":",
        "input_tokens": 420,
        "output_tokens": 76,
        "cost_usd": 0.0024000000000000002
      },
      {
        "ts": 1777590105.105083,
        "neg_id": "ca3246b6-5f39-4862-90cb-f241aa2fee6d",
        "node_name": "a_r0",
        "model": "claude-sonnet-4-6",
        "action": "propose",
        "round_n": 0,
        "relative_time": 0.09090909090909091,
        "role": "seller",
        "reservation": 0.3799780399684923,
        "my_last_util": 0.0,
        "opp_offer_util": 0.0,
        "history_my_utils": [],
        "history_opp_utils": [],
        "decision_target": 0.85,
        "decision_accept": false,
        "raw_text": "{\"target_utility\": 0.85, \"accept\": false}",
        "input_tokens": 224,
        "output_tokens": 18,
        "cache_creation": 0,
        "cache_read": 0,
        "latency_ms": 1039.87717628479,
        "cost_usd": 0.0009419999999999999
      },
      {
        "ts": 1777590106.428618,
        "neg_id": "ca3246b6-5f39-4862-90cb-f241aa2fee6d",
        "node_name": "b_r0",
        "model": "claude-sonnet-4-6",
        "action": "respond",
        "round_n": 0,
        "relative_time": 0.09090909090909091,
        "role": "buyer",
        "reservation": 0.457457628816719,
        "my_last_util": 0.0,
        "opp_offer_util": 0.3015344083714519,
        "history_my_utils": [],
        "history_opp_utils": [
          0.3015344083714519
        ],
        "decision_target": 0.75,
        "decision_accept": false,
        "raw_text": "{\"target_utility\": 0.75, \"accept\": false}",
        "input_tokens": 248,
        "output_tokens": 18,
        "cache_creation": 0,
        "cache_read": 0,
        "latency_ms": 1317.1777725219727,
        "cost_usd": 0.0010140000000000001
      },
      {
        "ts": 1777590107.726649,
        "neg_id": "ca3246b6-5f39-4862-90cb-f241aa2fee6d",
        "node_name": "b_r0",
        "model": "claude-sonnet-4-6",
        "action": "propose",
        "round_n": 0,
        "relative_time": 0.09090909090909091,
        "role": "buyer",
        "reservation": 0.457457628816719,
        "my_last_util": 0.0,
        "opp_offer_util": 0.3015344083714519,
        "history_my_utils": [],
        "history_opp_utils": [
          0.3015344083714519
        ],
        "decision_target": 0.82,
        "decision_accept": false,
        "raw_text": "{\"target_utility\": 0.82, \"accept\": false}",
        "input_tokens": 231,
        "output_tokens": 18,
        "cache_creation": 0,
        "cache_read": 0,
        "latency_ms": 1297.964096069336,
        "cost_usd": 0.0009630000000000001
      },
      {
        "ts": 1777590108.932065,
        "neg_id": "ca3246b6-5f39-4862-90cb-f241aa2fee6d",
        "node_name": "a_r0",
        "model": "claude-sonnet-4-6",
        "action": "respond",
        "round_n": 1,
        "relative_time": 0.18181818181818182,
        "role": "seller",
        "reservation": 0.3799780399684923,
        "my_last_util": 0.849801408901122,
        "opp_offer_util": 0.7258474105574813,
        "history_my_utils": [
          0.849801408901122
        ],
        "history_opp_utils": [
          0.7258474105574813
        ],
        "decision_target": 0.8,
        "decision_accept": false,
        "raw_text": "{\"target_utility\": 0.800, \"accept\": false}",
        "input_tokens": 261,
        "output_tokens": 18,
        "cache_creation": 0,
        "cache_read": 0,
        "latency_ms": 1204.111099243164,
        "cost_usd": 0.0010530000000000001
      },
      {
        "ts": 1777590110.119863,
        "neg_id": "ca3246b6-5f39-4862-90cb-f241aa2fee6d",
        "node_name": "a_r0",
        "model": "claude-sonnet-4-6",
        "action": "propose",
        "round_n": 1,
        "relative_time": 0.18181818181818182,
        "role": "seller",
        "reservation": 0.3799780399684923,
        "my_last_util": 0.849801408901122,
        "opp_offer_util": 0.7258474105574813,
        "history_my_utils": [
          0.849801408901122
        ],
        "history_opp_utils": [
          0.7258474105574813
        ],
        "decision_target": 0.8,
        "decision_accept": false,
        "raw_text": "{\"target_utility\": 0.800, \"accept\": false}",
        "input_tokens": 244,
        "output_tokens": 18,
        "cache_creation": 0,
        "cache_read": 0,
        "latency_ms": 1187.7307891845703,
        "cost_usd": 0.001002
      },
      {
        "ts": 1777590116.263283,
        "neg_id": "ca3246b6-5f39-4862-90cb-f241aa2fee6d",
        "node_name": "b_r0",
        "model": "claude-sonnet-4-6",
        "action": "respond",
        "round_n": 1,
        "relative_time": 0.18181818181818182,
        "role": "buyer",
        "reservation": 0.457457628816719,
        "my_last_util": 0.7793616680123941,
        "opp_offer_util": 0.6798143222538645,
        "history_my_utils": [
          0.7793616680123941
        ],
        "history_opp_utils": [
          0.3015344083714519,
          0.6798143222538645
        ],
        "decision_target": 0.507457628816719,
        "decision_accept": false,
        "raw_text": "Looking at the negotiation state:\n\n- My BATNA: 0.457\n- Opponent's last offer to me: 0.680\n- My initial demand: 0.779\n- We're at t=0.18 (very early in negotiation, deadline at t=1.0)\n\nAnalysis:\n- The o",
        "input_tokens": 275,
        "output_tokens": 256,
        "cache_creation": 0,
        "cache_read": 0,
        "latency_ms": 6142.035007476807,
        "cost_usd": 0.004665
      },
      {
        "ts": 1777590117.491183,
        "neg_id": "ca3246b6-5f39-4862-90cb-f241aa2fee6d",
        "node_name": "b_r0",
        "model": "claude-sonnet-4-6",
        "action": "propose",
        "round_n": 1,
        "relative_time": 0.18181818181818182,
        "role": "buyer",
        "reservation": 0.457457628816719,
        "my_last_util": 0.7793616680123941,
        "opp_offer_util": 0.6798143222538645,
        "history_my_utils": [
          0.7793616680123941
        ],
        "history_opp_utils": [
          0.3015344083714519,
          0.6798143222538645
        ],
        "decision_target": 0.74,
        "decision_accept": false,
        "raw_text": "{\"target_utility\": 0.74, \"accept\": false}",
        "input_tokens": 258,
        "output_tokens": 18,
        "cache_creation": 0,
        "cache_read": 0,
        "latency_ms": 1227.8351783752441,
        "cost_usd": 0.001044
      },
      {
        "ts": 1777590123.455341,
        "neg_id": "ca3246b6-5f39-4862-90cb-f241aa2fee6d",
        "node_name": "a_r0",
        "model": "claude-sonnet-4-6",
        "action": "respond",
        "round_n": 2,
        "relative_time": 0.2727272727272727,
        "role": "seller",
        "reservation": 0.3799780399684923,
        "my_last_util": 0.7516711602124064,
        "opp_offer_util": 0.7465064102814214,
        "history_my_utils": [
          0.849801408901122,
          0.7516711602124064
        ],
        "history_opp_utils": [
          0.7258474105574813,
          0.7465064102814214
        ],
        "decision_target": 0.75,
        "decision_accept": false,
        "raw_text": "Looking at the negotiation state:\n\n- My BATNA is 0.380\n- Opponent's last offer gives me utility 0.747\n- My last demand was 0.752\n- We're at t=0.27 (early in negotiation, deadline at t=1.0)\n\nThe gap be",
        "input_tokens": 288,
        "output_tokens": 256,
        "cache_creation": 0,
        "cache_read": 0,
        "latency_ms": 5962.857007980347,
        "cost_usd": 0.004704
      },
      {
        "ts": 1777590129.266865,
        "neg_id": "ca3246b6-5f39-4862-90cb-f241aa2fee6d",
        "node_name": "a_r0",
        "model": "claude-sonnet-4-6",
        "action": "propose",
        "round_n": 2,
        "relative_time": 0.2727272727272727,
        "role": "seller",
        "reservation": 0.3799780399684923,
        "my_last_util": 0.7516711602124064,
        "opp_offer_util": 0.7465064102814214,
        "history_my_utils": [
          0.849801408901122,
          0.7516711602124064
        ],
        "history_opp_utils": [
          0.7258474105574813,
          0.7465064102814214
        ],
        "decision_target": 0.42997803996849226,
        "decision_accept": false,
        "raw_text": "Looking at the negotiation state:\n\n- My offers: 0.850 \u2192 0.752 (dropped 0.098)\n- Opponent's offers to me: 0.726 \u2192 0.747 (moving UP, which is favorable)\n\nThe opponent is actually increasing their offer ",
        "input_tokens": 271,
        "output_tokens": 256,
        "cache_creation": 0,
        "cache_read": 0,
        "latency_ms": 5811.444997787476,
        "cost_usd": 0.004652999999999999
      },
      {
        "ts": 1777590134.988842,
        "neg_id": "ca3246b6-5f39-4862-90cb-f241aa2fee6d",
        "node_name": "b_r0",
        "model": "claude-sonnet-4-6",
        "action": "respond",
        "round_n": 2,
        "relative_time": 0.2727272727272727,
        "role": "buyer",
        "reservation": 0.457457628816719,
        "my_last_util": 0.6997237914055704,
        "opp_offer_util": 0.5530405867048757,
        "history_my_utils": [
          0.7793616680123941,
          0.6997237914055704
        ],
        "history_opp_utils": [
          0.3015344083714519,
          0.6798143222538645,
          0.5530405867048757
        ],
        "decision_target": 0.665,
        "decision_accept": false,
        "raw_text": "Looking at the negotiation history:\n\n- My BATNA is 0.457\n- Current opponent offer: 0.553 (utility to me)\n- My last demand: 0.700\n- We're at t=0.27 (early in negotiation, deadline at t=1.0)\n\nThe oppone",
        "input_tokens": 302,
        "output_tokens": 255,
        "cache_creation": 0,
        "cache_read": 0,
        "latency_ms": 5719.846963882446,
        "cost_usd": 0.004731000000000001
      },
      {
        "ts": 1777590140.239414,
        "neg_id": "ca3246b6-5f39-4862-90cb-f241aa2fee6d",
        "node_name": "b_r0",
        "model": "claude-sonnet-4-6",
        "action": "propose",
        "round_n": 2,
        "relative_time": 0.2727272727272727,
        "role": "buyer",
        "reservation": 0.457457628816719,
        "my_last_util": 0.6997237914055704,
        "opp_offer_util": 0.5530405867048757,
        "history_my_utils": [
          0.7793616680123941,
          0.6997237914055704
        ],
        "history_opp_utils": [
          0.3015344083714519,
          0.6798143222538645,
          0.5530405867048757
        ],
        "decision_target": 0.507457628816719,
        "decision_accept": false,
        "raw_text": "Looking at the negotiation history:\n\n- My offers: 0.779 \u2192 0.700 (conceding ~0.079)\n- Opponent's offers to me: 0.302 \u2192 0.680 \u2192 0.553 (volatile, but last was 0.553)\n\nThe opponent's last offer of 0.553 i",
        "input_tokens": 285,
        "output_tokens": 256,
        "cache_creation": 0,
        "cache_read": 0,
        "latency_ms": 5250.483989715576,
        "cost_usd": 0.0046949999999999995
      },
      {
        "ts": 1777590146.062449,
        "neg_id": "ca3246b6-5f39-4862-90cb-f241aa2fee6d",
        "node_name": "a_r0",
        "model": "claude-sonnet-4-6",
        "action": "respond",
        "round_n": 3,
        "relative_time": 0.36363636363636365,
        "role": "seller",
        "reservation": 0.3799780399684923,
        "my_last_util": 0.38168415793908467,
        "opp_offer_util": 0.38168415793908467,
        "history_my_utils": [
          0.849801408901122,
          0.7516711602124064,
          0.38168415793908467
        ],
        "history_opp_utils": [
          0.7258474105574813,
          0.7465064102814214,
          0.38168415793908467
        ],
        "decision_target": 0.42997803996849226,
        "decision_accept": false,
        "raw_text": "Looking at the negotiation state:\n\n- My BATNA is 0.380\n- The opponent's last offer gives me utility 0.382\n- My last demand was also 0.382\n- We've essentially converged at 0.382\n\nThe offers have conver",
        "input_tokens": 315,
        "output_tokens": 256,
        "cache_creation": 0,
        "cache_read": 0,
        "latency_ms": 5821.977138519287,
        "cost_usd": 0.004784999999999999
      },
      {
        "ts": 1777590151.2467468,
        "neg_id": "ca3246b6-5f39-4862-90cb-f241aa2fee6d",
        "node_name": "a_r0",
        "model": "claude-sonnet-4-6",
        "action": "propose",
        "round_n": 3,
        "relative_time": 0.36363636363636365,
        "role": "seller",
        "reservation": 0.3799780399684923,
        "my_last_util": 0.38168415793908467,
        "opp_offer_util": 0.38168415793908467,
        "history_my_utils": [
          0.849801408901122,
          0.7516711602124064,
          0.38168415793908467
        ],
        "history_opp_utils": [
          0.7258474105574813,
          0.7465064102814214,
          0.38168415793908467
        ],
        "decision_target": 0.42997803996849226,
        "decision_accept": false,
        "raw_text": "Looking at the negotiation history:\n\n- Round 3: Opponent offered me 0.747, I demanded 0.752 (very close)\n- Round 4: I suddenly dropped to 0.382 (near BATNA)\n- Round 5: Opponent matched at 0.382\n\nThe o",
        "input_tokens": 298,
        "output_tokens": 256,
        "cache_creation": 0,
        "cache_read": 0,
        "latency_ms": 5184.118032455444,
        "cost_usd": 0.0047339999999999995
      },
      {
        "ts": 1777590156.3365371,
        "neg_id": "ca3246b6-5f39-4862-90cb-f241aa2fee6d",
        "node_name": "b_r0",
        "model": "claude-sonnet-4-6",
        "action": "respond",
        "round_n": 3,
        "relative_time": 0.36363636363636365,
        "role": "buyer",
        "reservation": 0.457457628816719,
        "my_last_util": 0.5530405867048757,
        "opp_offer_util": 0.5530405867048757,
        "history_my_utils": [
          0.7793616680123941,
          0.6997237914055704,
          0.5530405867048757
        ],
        "history_opp_utils": [
          0.3015344083714519,
          0.6798143222538645,
          0.5530405867048757,
          0.5530405867048757
        ],
        "decision_target": 0.553,
        "decision_accept": true,
        "raw_text": "The opponent has now offered me 0.553 three times in a row (rounds 5, and 7), and my last demand was also 0.553. We've converged on the same number. This is a clear signal that 0.553 is the equilibriu",
        "input_tokens": 316,
        "output_tokens": 227,
        "cache_creation": 0,
        "cache_read": 0,
        "latency_ms": 5088.313102722168,
        "cost_usd": 0.004353
      }
    ]
  }
}