GPT-5 vs Phi 4
Cost and capability comparison. For a sample workload of 1,000 input and 500 output tokens across 100,000 requests/month, Phi 4 is cheaper by about $611.00/month.
| GPT-5 | Phi 4 | |
|---|---|---|
| Provider | openai | microsoft |
| Input / 1M | $1.25 | $0.0700 |
| Output / 1M | $10.00 | $0.1400 |
| Per request (sample) | $0.00625 | $0.000140 |
| Monthly (sample) | $625.00 | $14.00 |
| Context window | 128,000 | 16,384 |
| Vision | Yes | No |
| Reasoning | Yes | No |
| Arena · Overall | 1405 | 1217 |
| Arena · Coding | 1419 | — |
| Arena · Math & reasoning | 1420 | — |
| Arena · Agentic / tool use | 1415 | — |
Intelligence scores are community Arena ratings from LMArena / arena.ai, used under CC BY 4.0. Snapshot last refreshed 28 July 2026. Scores are a relative signal, not an absolute measure of capability. A Measured score was voted on directly; an Estimated score is inherited from an identical base model (a regional/creator-prefixed hosting duplicate). See our methodology.
Compare on your own workload
GPT-5 and Phi 4 are pre-loaded. Adjust the tokens and monthly volume to see which is cheaper for your usage.
FAQ
Which is cheaper, GPT-5 or Phi 4?
For a workload of 1,000 input and 500 output tokens over 100,000 requests/month, Phi 4 is cheaper, costing about $14.00/month versus $625.00/month.
What is the context window of GPT-5 and Phi 4?
GPT-5 supports 128,000 tokens, while Phi 4 supports 16,384 tokens.
Estimates for planning only. Verify current pricing with each provider.