FrontierThe story, in brief
GPT-5.5 tops benchmarks but still hallucinates frequently and costs 20 percent more over the API
GPT-5.5 reclaims benchmark crown—but hallucinations persist and API costs jump 20%. The trade-off leaders need to know.
The KeyNews take
Why it matters
OpenAI's latest model delivers top-tier performance on industry benchmarks while introducing a pricing increase and persistent reliability issues. For enterprises evaluating model selection, this signals capability gains come with both cost and accuracy trade-offs that need stress-testing before deployment.
The key facts
5 to knowGPT-5.5 tops AI benchmarks vs competitors
20% API price increase
Hallucination issues remain despite capability improvements
Positioned as best value among proprietary models despite higher cost
Published April 24, 2026 on The Decoder
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The Decoderthe-decoder.com
Publisher excerpt: GPT-5.5 pushes OpenAI back to the top of the AI benchmarks. The price went up, but it still looks like the best bang for your buck among proprietary models.