diff --git a/crates/apollo_starknet_os_program/src/cairo/starkware/starknet/core/os/constants.cairo b/crates/apollo_starknet_os_program/src/cairo/starkware/starknet/core/os/constants.cairo
index 16164bf1702..20bde887081 100644
--- a/crates/apollo_starknet_os_program/src/cairo/starkware/starknet/core/os/constants.cairo
+++ b/crates/apollo_starknet_os_program/src/cairo/starkware/starknet/core/os/constants.cairo
@@ -79,7 +79,7 @@ const MUL_MOD_GAS_COST = 604;
 const ECDSA_GAS_COST = 10561;
 const MEMORY_HOLE_GAS_COST = 10;
 
-const DEFAULT_INITIAL_GAS_COST = 100000000 * STEP_GAS_COST;
+const DEFAULT_INITIAL_GAS_COST = 10000000000;
 const VALIDATE_MAX_SIERRA_GAS = 100000000;
 const EXECUTE_MAX_SIERRA_GAS = 1000000000;
 const DEFAULT_INITIAL_GAS_COST_NO_L2 = VALIDATE_MAX_SIERRA_GAS + EXECUTE_MAX_SIERRA_GAS;
@@ -88,46 +88,43 @@ const DEFAULT_INITIAL_GAS_COST_NO_L2 = VALIDATE_MAX_SIERRA_GAS + EXECUTE_MAX_SIE
 
 // The initial budget at an entry point. This needs to be high enough to cover the initial get_gas.
 // The entry point may refund whatever remains from the initial budget.
-const ENTRY_POINT_INITIAL_BUDGET = 100 * STEP_GAS_COST;
+const ENTRY_POINT_INITIAL_BUDGET = 10000;
 // The gas cost of each syscall libfunc (this value is hard-coded by the compiler).
 // This needs to be high enough to cover OS costs in the case of failure due to out of gas.
-const SYSCALL_BASE_GAS_COST = 100 * STEP_GAS_COST;
+const SYSCALL_BASE_GAS_COST = 10000;
 
 // Syscall gas costs.
-const CALL_CONTRACT_GAS_COST = 18 * RANGE_CHECK_GAS_COST + 903 * STEP_GAS_COST;
-const DEPLOY_GAS_COST = 7 * PEDERSEN_GAS_COST + 21 * RANGE_CHECK_GAS_COST + 1173 * STEP_GAS_COST;
-const DEPLOY_CALLDATA_FACTOR_GAS_COST = 1 * PEDERSEN_GAS_COST + 8 * STEP_GAS_COST;
-const GET_BLOCK_HASH_GAS_COST = 2 * RANGE_CHECK_GAS_COST + 107 * STEP_GAS_COST;
-const GET_CLASS_HASH_AT_GAS_COST = 1 * SYSCALL_BASE_GAS_COST;
-const GET_EXECUTION_INFO_GAS_COST = 2 * RANGE_CHECK_GAS_COST + 125 * STEP_GAS_COST;
-const LIBRARY_CALL_GAS_COST = 18 * RANGE_CHECK_GAS_COST + 879 * STEP_GAS_COST;
-const REPLACE_CLASS_GAS_COST = 1 * RANGE_CHECK_GAS_COST + 106 * STEP_GAS_COST;
+const CALL_CONTRACT_GAS_COST = 91560;
+const DEPLOY_GAS_COST = 147120;
+const DEPLOY_CALLDATA_FACTOR_GAS_COST = 4850;
+const GET_BLOCK_HASH_GAS_COST = 10840;
+const GET_CLASS_HASH_AT_GAS_COST = 10000;
+const GET_EXECUTION_INFO_GAS_COST = 12640;
+const LIBRARY_CALL_GAS_COST = 89160;
+const REPLACE_CLASS_GAS_COST = 10670;
 // TODO(Yoni, 1/1/2026): take into account Patricia updates and dict squash.
-const STORAGE_READ_GAS_COST = 1 * SYSCALL_BASE_GAS_COST;
-const STORAGE_WRITE_GAS_COST = 1 * SYSCALL_BASE_GAS_COST;
-const EMIT_EVENT_GAS_COST = 1 * SYSCALL_BASE_GAS_COST;
-const SEND_MESSAGE_TO_L1_GAS_COST = 1 * RANGE_CHECK_GAS_COST + 144 * STEP_GAS_COST;
-const META_TX_V0_GAS_COST = 9 * PEDERSEN_GAS_COST + 20 * RANGE_CHECK_GAS_COST + 1301 *
-    STEP_GAS_COST;
-const META_TX_V0_CALLDATA_FACTOR_GAS_COST = 1 * PEDERSEN_GAS_COST + 8 * STEP_GAS_COST;
+const STORAGE_READ_GAS_COST = 10000;
+const STORAGE_WRITE_GAS_COST = 10000;
+const EMIT_EVENT_GAS_COST = 10000;
+const SEND_MESSAGE_TO_L1_GAS_COST = 14470;
+const META_TX_V0_GAS_COST = 167950;
+const META_TX_V0_CALLDATA_FACTOR_GAS_COST = 4850;
 
 // Note the the following costs include `SYSCALL_BASE_GAS_COST` implicitly.
-const SECP256K1_ADD_GAS_COST = 29 * RANGE_CHECK_GAS_COST + 412 * STEP_GAS_COST;
-const SECP256K1_GET_POINT_FROM_X_GAS_COST = 30 * RANGE_CHECK_GAS_COST + 397 * STEP_GAS_COST;
-const SECP256K1_GET_XY_GAS_COST = 11 * RANGE_CHECK_GAS_COST + 209 * STEP_GAS_COST;
-const SECP256K1_MUL_GAS_COST = 7045 * RANGE_CHECK_GAS_COST + 76507 * STEP_GAS_COST;
-const SECP256K1_NEW_GAS_COST = 35 * RANGE_CHECK_GAS_COST + 463 * STEP_GAS_COST;
-const SECP256R1_ADD_GAS_COST = 57 * RANGE_CHECK_GAS_COST + 595 * STEP_GAS_COST;
-const SECP256R1_GET_POINT_FROM_X_GAS_COST = 44 * RANGE_CHECK_GAS_COST + 516 * STEP_GAS_COST;
-const SECP256R1_GET_XY_GAS_COST = 11 * RANGE_CHECK_GAS_COST + 211 * STEP_GAS_COST;
-const SECP256R1_MUL_GAS_COST = 13961 * RANGE_CHECK_GAS_COST + 125346 * STEP_GAS_COST;
-const SECP256R1_NEW_GAS_COST = 49 * RANGE_CHECK_GAS_COST + 582 * STEP_GAS_COST;
-
-const KECCAK_GAS_COST = 1 * SYSCALL_BASE_GAS_COST;
-const KECCAK_ROUND_COST_GAS_COST = 6 * BITWISE_BUILTIN_GAS_COST + 1 * KECCAK_BUILTIN_GAS_COST + 56 *
-    RANGE_CHECK_GAS_COST + 281 * STEP_GAS_COST;
-const SHA256_PROCESS_BLOCK_GAS_COST = 1115 * BITWISE_BUILTIN_GAS_COST + 65 * RANGE_CHECK_GAS_COST +
-    1867 * STEP_GAS_COST;
+const SECP256K1_ADD_GAS_COST = 43230;
+const SECP256K1_GET_POINT_FROM_X_GAS_COST = 41800;
+const SECP256K1_GET_XY_GAS_COST = 21670;
+const SECP256K1_MUL_GAS_COST = 8143850;
+const SECP256K1_NEW_GAS_COST = 48750;
+const SECP256R1_ADD_GAS_COST = 63490;
+const SECP256R1_GET_POINT_FROM_X_GAS_COST = 54680;
+const SECP256R1_GET_XY_GAS_COST = 21870;
+const SECP256R1_MUL_GAS_COST = 13511870;
+const SECP256R1_NEW_GAS_COST = 61630;
+
+const KECCAK_GAS_COST = 10000;
+const KECCAK_ROUND_COST_GAS_COST = 171707;
+const SHA256_PROCESS_BLOCK_GAS_COST = 841295;
 
 // Cairo 1.0 error codes.
 const ERROR_BLOCK_NUMBER_OUT_OF_RANGE = 'Block number out of range';