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Specs, loft charts and modeled carry for two sets golfers cross-shop. Callaway Quantum Max Fast and Callaway Quantum Max OS each have a full page.
| Spec | Callaway Quantum Max Fast | Callaway Quantum Max OS |
|---|---|---|
| Category | Super Game Improvement | Super Game Improvement |
| Player type | Senior | High Handicap |
| Model year | 2026 | 2026 |
| 7-iron loft | 26.5° | 26.5° |
| PW loft | 40° | 40.5° |
| Set makeup | 6-iron to PW | 5-iron to PW |
| MSRP | $999 | $1,099 |
| Technology | Wide Sole, AI Designed Face, Hollow Body, Stronger Lofts, High Launch | Wide Sole, Perimeter Weighting, AI Designed Face, Hollow Body, Stronger Lofts |
| Editorial recognition | - | - |
| Club | Callaway Quantum Max Fast | Callaway Quantum Max OS | Loft delta |
|---|---|---|---|
| 5i | - | 19.5° | - |
| 6i | 23° | 23° | 0° |
| 7i | 26.5° | 26.5° | 0° |
| 8i | 30.5° | 31° | -0.5° |
| 9i | 35° | 35.5° | -0.5° |
| PW | 40° | 40.5° | -0.5° |
Modeled from TrackMan-based norms scaled to each set's lofts, not measured for these models.
| Club | Moderate swing | Average swing | Faster swing | |||
|---|---|---|---|---|---|---|
| Quantum Max Fast | Quantum Max OS | Quantum Max Fast | Quantum Max OS | Quantum Max Fast | Quantum Max OS | |
| 5i | - | 167 y | - | 184 y | - | 200 y |
| 6i | 158 y | 158 y | 174 y | 174 y | 189 y | 189 y |
| 7i | 148 y | 148 y | 163 y | 163 y | 177 y | 177 y |
| 8i | 138 y | 138 y | 152 y | 152 y | 165 y | 165 y |
| 9i | 126 y | 126 y | 139 y | 139 y | 151 y | 151 y |
| PW | 116 y | 116 y | 128 y | 128 y | 139 y | 139 y |
| Club | Callaway Quantum Max Fast | Callaway Quantum Max OS | Δ carry |
|---|---|---|---|
| 5i | - | 168 yd | - |
| 6i | 159 yd | 159 yd | 0 |
| 7i(anchor) | 150 yd | 150 yd | 0 |
| 8i | 140 yd | 139 yd | -1 |
| 9i | 129 yd | 128 yd | -1 |
| PW | 116 yd | 115 yd | -1 |
| Estimated from loft specs · ±5 yd accuracy | avg -0.8 yd | ||
The Callaway Quantum Max Fast and the Callaway Quantum Max OS are both super game improvement irons with a wide sole, a hollow body, an AI designed face and stronger lofts, and both play a 26.5° 7-iron, so stock distances line up club for club. The differences sit at the edges. Only the Quantum Max Fast is tagged High Launch, which points to a set built to get the ball up easily. Only the Quantum Max OS is tagged Perimeter Weighting, the mark of a head built to stay stable on off-center hits. The OS stock set also starts at the 5-iron, while the Fast data starts at the 6-iron. Golfers who struggle to launch long irons lean toward the Fast. Golfers who want the extra long iron and the most help on mishits lean toward the OS.
At list price the Quantum Max Fast is $100 cheaper, $999 against $1,099. With matched lofts, the choice comes down to priorities. If launch height and price matter most, the Quantum Max Fast is the pick. If forgiveness and a set that starts at the 5-iron matter more, the Quantum Max OS is worth the extra money. Neither set has editorial recognition on file, so the tags and the set makeup are what separate them.