Ferrari is approaching what could be its most important remaining development test of the 2026 Formula 1 season, with the final major upgrade package for the SF-26 expected at Austin. The timing is particularly significant because recent updates from Mercedes and McLaren have failed to produce clear gains, while Red Bull has followed a very different trajectory and steadily improved the RB22.
From before the season began, the team principals of Formula 1’s four leading teams had identified development as one of the defining battles of the year. With the championship now entering its final third, the pattern of that upgrade race is becoming clearer – and the latest phase has shown how difficult extracting further performance from these cars has become.
How the Formula 1 upgrade battle developed through 2026
The first major development phase came in May, during the stretch between Miami and Canada. Mercedes, Ferrari and McLaren all introduced their first meaningful steps forward during that period, and the initial results were generally positive.
A second wave followed during the latter half of June, between the Barcelona and Austrian Grands Prix. Ferrari and Red Bull were particularly active, introducing extensive and clearly visible changes to their respective cars.
That period probably represented Ferrari’s performance peak so far this season. Red Bull, meanwhile, began moving in a more productive direction after an uncertain start, gradually establishing the development route that would become increasingly important later in the campaign. The evolving competitive picture between Maranello and its main opponents can also be followed through the Ferrari vs F1 rivals statistics.
Mercedes chose to wait during that phase while benefiting from its substantial engine advantage. McLaren made its second major intervention later, bringing an upgrade step for the MCL38 in Hungary. That package proved highly effective and allowed the team to fight at the front in three of the next four Grands Prix, contributing to victories at Zandvoort and the Hungaroring.
McLaren and Mercedes encounter doubts with their latest upgrades
The picture has become considerably less straightforward in the most recent phase, particularly across the Baku and Sepang weekends.
McLaren arrived in Azerbaijan with a major package for the MCL40 that represented something closer to a B-specification car than a conventional update. Expectations were high given the Woking technical department’s strong development record, but the anticipated step did not materialise clearly.
Across Azerbaijan and Malaysia, the car did not show a decisive improvement and appeared instead to move towards the position of third-fastest team, irrespective of individual race circumstances or driver errors.
Mercedes encountered a broadly similar situation one round later. After several months of careful preparation, the team introduced a substantially altered W17, yet the immediate outcome left its engineers without a clear answer as to whether the car had actually become faster.
The uncertainty could be linked to several variables, including circuit characteristics, asphalt conditions and temperatures. The broader development questions surrounding the W17 have also become increasingly relevant as Mercedes attempts to unlock further potential from the car.
One particularly interesting detail is that the MCL40 and W17 have effectively moved towards each other in one area of design philosophy. Both abandoned the original general shapes of their sidepods, with the two cars broadly exchanging elements of their previous approaches.
Red Bull’s RB22 development has followed a different path
Red Bull stands apart from the two latest examples. Despite beginning the season with considerable uncertainty, its development programme produced an even more substantial morphological transformation of the RB22 than those seen on rival cars.
Unlike the recent McLaren and Mercedes packages, however, those changes were accompanied by progressive improvements rather than an immediate question over whether the car had moved forwards or backwards.
The process culminated with the Baku specification, which proved competitive in the hands of both drivers before Red Bull went on to win at Sepang. Ferrari has also been paying close attention to the technical direction of its rivals during a season in which Lewis Hamilton has highlighted how competitors adopted ideas pioneered by Ferrari.
Why the latest F1 upgrades are becoming harder to make work
The recent problems encountered by McLaren and Mercedes recall, with important differences, the final stages of the previous Formula 1 regulatory cycle. At that point, even apparently minor upgrades had become increasingly difficult to optimise because teams were already operating close to the development limits of highly mature cars.
A similar pattern may now be emerging earlier than expected. These cars appear to have reached a high level of development maturity, meaning a new component or aerodynamic direction no longer guarantees a measurable performance gain.
Instead, teams must be increasingly careful not to push one characteristic too far and compromise the overall balance of the car. A package that improves one area can create new weaknesses elsewhere, making correlation, set-up and circuit characteristics increasingly important when judging whether an upgrade has genuinely worked.
Ferrari’s final SF-26 upgrade expected at Austin
There is therefore no obvious winner yet in the 2026 upgrade battle. Every leading team has made mistakes at some point, and Red Bull’s progress suggests that encountering those difficulties earlier may have provided more time to identify the correct development direction.
Ferrari now faces its own crucial test. According to multiple reports, the final upgrade step for the SF-26 should arrive at Austin and is expected to include a significant series of changes.
The timing makes its effectiveness particularly important. Ferrari arrives at this stage after seeing McLaren and Mercedes struggle to confirm that their newest concepts have delivered the intended progress, while Red Bull has demonstrated what can happen when a difficult development path eventually begins producing consistent gains.
Austin will also provide another important reference point for a car whose characteristics could play a role across the closing phase of the campaign. Recent analysis has already highlighted an SF-26 trait that could prove relevant at Austin, adding another layer of interest to Ferrari’s final upgrade programme.
The broader technical evolution of the car remains one of the central themes of Ferrari’s season, with further developments and detailed analysis available in the Ferrari technical analysis section. The central question at Austin will be simple but increasingly difficult to answer in modern Formula 1: has Ferrari found genuine lap time, or has the SF-26 reached the same development sensitivity now troubling some of its rivals?
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