TradingKey - On August 17 Eastern Time, Cerebras Systems (CBRS) surged 15% in a single day, breaking through the $250 mark.
Wedbush Securities stated in its latest research report that OpenAI disclosed the Ultrafast mode of GPT-5.6 Sol will be powered by compute from Cerebras, indicating that their partnership continues to make positive progress.
Wedbush analyst Matt Bryson said this news indicates that the partnership between Cerebras and OpenAI is progressing. OpenAI previously committed to purchasing 750 megawatts of compute capacity provided by Cerebras through 2028; meanwhile, the agreement allows OpenAI to extend the contract term for that capacity and further expand the procurement scale before 2030.
Reportedly, the newly added Ultrafast mode in GPT-5.6 Sol boasts processing speeds up to 14 times faster than OpenAI's standard mode. Currently, this mode is being rolled out in batches to select clients with high demands for low latency. OpenAI stated that it has seen encouraging test feedback in scenarios including event response and reliability, financial research and security, customer support and voice interaction, commerce, as well as real-time research and experimentation.
The initial batch of early customers using GPT-5.6 Sol in Ultrafast mode includes quantitative trading giant Jane Street, AI lead generation company Podium, and financial firms Basis and Rogo.
In April this year, Cerebras reached a $20 billion partnership agreement with OpenAI. Under the agreement, Cerebras will provide OpenAI with servers powered by its proprietary chips over the next three years. Meanwhile, OpenAI committed to providing about $1 billion to Cerebras to support the construction of data centers required to run AI products.

CBRS 4-hour candlestick chart, source: TradingView
Cerebras Systems' stock price previously stabilized near a low of around $161 and oscillated upward. Recently, it reclaimed its major moving averages and broke out above the platform near $247 with a long bullish candlestick, structurally representing a strong breakout following an accelerated rebound.
Currently, the stock has successfully broken above the 0.382 Fibonacci retracement level ($247.24) and reclaimed the 5-day, 10-day, 20-day, 40-day, and 80-day moving averages, with short-term bulls regaining the upper hand. However, the $254 to $261 range has entered the intraday surge zone and a dense band of previous rally highs, presenting short-term profit-taking pressure.
If the stock price can hold above the 0.382 Fibonacci retracement level ($247.24) after a pullback, bulls are expected to continue advancing toward the 0.5 Fibonacci retracement level ($273.80).
The primary support is the 0.382 Fibonacci retracement level ($247.24), which also serves as the bull-bear dividing line after this breakout. Below that, key attention should be paid to the region around the 5-day and 10-day moving averages; if lost, the short term will shift to a pullback confirmation, with the next stronger support targeting the 0.236 Fibonacci retracement level ($214.38), which forms a support zone near the 40-day and 80-day moving averages.