iSeries
iSeries is what IBM called the AS/400 line from 2000 under its eServer brand, and it is still the word many shops use for any IBM i machine. The distinction matters for AI work, because IBM states that IBM i 7.1 is not supported on the iSeries family, so true iSeries-era hardware stops at IBM i 6.1 and cannot run a release current AI tooling expects.
What does iSeries mean?
iSeries is a brand name, not a model number. In 2000 IBM put four server lines under one eServer family and gave each a letter. AS/400 became iSeries, RS/6000 became pSeries, Netfinity became xSeries and System/390 became zSeries. The i stood for Integrated. Think of a street that got renamed four times. The houses never moved, and the neighbors kept using the old street name anyway. That is why a shop running a brand new Power server will still tell you on the phone that they run an iSeries.
What has IBM called this machine?
Seven names for one machine line
- June 21, 1988IBM announces the Application System/400, the AS/400.
- 1994New models carry the AS/400 Advanced Series name.
- 1997The line is rebranded AS/400e, where the e stands for e-business.
- 2000The eServer iSeries arrives as part of IBM's eServer branding.
- 2004eServer i5 models ship on Power 5 chips, and OS/400 becomes i5/OS.
- 2006IBM moves from eServer to System branding, so eServer i5 becomes System i.
- April 2008System i and System p merge into IBM Power Systems, and i5/OS is renamed IBM i.
IBM i 6.1, the release that shipped with that 2008 change, was generally available on March 21, 2008 according to IBM's IBM i release life cycle page.
Can an iSeries run today's AI tools?
If the box really is iSeries-era hardware, no. IBM says plainly that IBM i 7.1 is not supported on System i models 800, 810, 825, 870, 890 or earlier members of the iSeries family. That means the newest release such a machine can reach is IBM i 6.1, which left IBM program support on September 30, 2015. Current releases moved the floor much higher. IBM i 7.5 needs Power 9 or newer, and IBM i 7.6 needs Power 10 at firmware FW1060 or newer, or Power 11.
What each release needs, and when IBM support ended
| IBM i release | Hardware IBM supports | End of program support |
|---|---|---|
| 6.1 | The highest release the iSeries family can reach | September 30, 2015 |
| 7.1 | Power 5 System i, Power 6 and Power 7, but no iSeries models | April 30, 2018 |
| 7.5 | Power 9, Power 10 and Power 11, not Power 8 or earlier | Not announced |
| 7.6 | Power 10 at firmware FW1060 or newer, and Power 11 | Not announced |
Support dates from IBM's IBM i release life cycle page. Hardware rows from IBM's own Planning to upgrade pages for IBM i 7.1, 7.5 and 7.6. The 7.6 page states that IBM i 7.6 is not supported on any servers with IBM Power9 and earlier processor technology.
What should I check before I budget for an AI tool?
Three checks that take five minutes
- Get the model, not the nicknameThe word iSeries tells you nothing about the chip inside. Write down the machine type and model, such as 9406-890, and which Power generation it belongs to.
- Compare it to the release floorMatch that generation against the release you need. Power 8 and earlier cannot run IBM i 7.5. Power 9 cannot run IBM i 7.6. If the hardware is below the floor, the release will not install, and the tool never gets a chance to fail.
- Check support, not just functionIBM i 6.1 left program support on September 30, 2015 and 7.1 on April 30, 2018. IBM does sell a Service Extension for some newer releases, listed as running to April 2026 for 7.2, September 2028 for 7.3 and September 2029 for 7.4. Nothing in that list reaches back to 6.1 or 7.1.
Service Extension dates are from IBM's IBM i release life cycle page, which also notes that a change in service level is announced with at least 12 months' notice.
Read the name on a vendor's AI product page carefully. A tool advertised for iSeries or AS/400 is almost always a tool for IBM i on current Power hardware, because that is the only place it can run. Ask for the minimum IBM i release and the minimum Power generation in writing before you budget for it.
Related Terms
AS/400
IBM's original 1988 midrange business computer platform; the term is still used informally to refer to IBM i systems and shops even though IBM has rebranded the hardware and OS multiple times since.
IBM i
IBM's operating system for Power servers running traditional AS/400-lineage business applications, with Db2 for i built directly into the OS.
OS/400
OS/400 is the original name of the operating system IBM now calls IBM i. It shipped with the AS/400 on August 26, 1988, became i5/OS in 2004 and IBM i in 2008, so the RPG, COBOL and Db2 for i objects that today's AI tools read sit on one unbroken operating system line.
IBM Power 10
IBM's Power processor generation that preceded Power11, announced August 17, 2020 and shipping from September 2021, the first Power chip to embed Matrix Math Acceleration into every core for on-chip AI inferencing without a separate GPU. IBM began winding down new Power10 sales in February 2026.
IBM Power 11
IBM's current generation of Power processor and server hardware, announced July 8, 2025 and generally available July 25, 2025, carrying forward Power10's on-chip Matrix Math Acceleration and becoming the first Power generation to support the IBM Spyre Accelerator card.
IBM i MCP Server
An open-source, IBM-published server implementing the Model Context Protocol (MCP), letting AI agents and LLMs query Db2 for i data and take defined actions on IBM i using natural language. In beta since October 2025.
watsonx Code Assistant for i
IBM's November 2025 preview announcement of an AI code assistant purpose-built for RPG on IBM i. The preview track was superseded by IBM Bob, which reached general availability in March 2026.