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Gemini 2.5 Pro Preview 0325 benchmark pricing The low price reported for Gemini 2.5 Pro Preview 0325 appears to be correct. false true

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Gemini 2.5 Pro Preview 0325 benchmark pricing

There has been some concern about the low $6 price reported to run Gemini 2.5 Pro Preview 0325 in the aider leaderboard. There are a couple of reasons for concern:

  • Aider uses litellm, which had an incorrect price for output tokens in their database at the time of the benchmark.
  • The new 0506 version of Gemini 2.5 Pro Preview reports much higher costs to benchmark.

This note reviews and audits the original 0325 benchmark results to investigate the reported price.

The incorrect litellm database entry does not appear to have affected the aider benchmark. Aider maintains and uses its own database of costs for some models, and it contained the correct pricing at the time of the benchmark. This was possible to confirm because aider records the git commit hash of the aider repository that was used to run each benchmark.

Timeline

  • 2025-04-04 19:54:45 UTC (Sat Apr 5 08:54:45 2025 +1300)

    • Correct value "output_cost_per_token": 0.000010 added to aider/resources/model-metadata.json
    • Commit eda796d in aider.

  • 2025-04-05 16:20:01 UTC (Sun Apr 6 00:20:01 2025 +0800)

    • First litellm commit of gemini/gemini-2.5-pro-preview-03-25 metadata, with incorrect price "output_cost_per_token": 0.0000010
    • Commit cd0a1e6 in litellm.

  • 2025-04-10 01:48:43 UTC (Wed Apr 9 18:48:43 2025 -0700)

    • litellm commit updates gemini/gemini-2.5-pro-preview-03-25 metadata, but not price
    • Commit ac4f32f in litellm.

  • 2025-04-12 04:55:50 UTC (2025-04-12-04-55-50 UTC)

    • Benchmark performed
    • Aider repo hash 0282574 recorded in benchmark results, without "dirty" indicating it was run on a clean checkout of the repo at commit 0282574.
    • Correct value "output_cost_per_token": 0.000010 is in aider/resources/model-metadata.json at commit 0282574
    • Confirmed that aider built and run from commit 0282574 honors output_cost_per_token from aider/resources/model-metadata.json by putting in an absurdly high value and benchmarking gemini/gemini-2.5-pro-preview-03-25

  • 2025-04-12 15:06:39 UTC (Apr 12 08:06:39 2025 -0700)

    • Benchmark results added to repo
    • Commit 7fbeafa in aider.

  • 2025-04-12 15:20:04 UTC (Sat Apr 12 19:20:04 2025 +0400)

    • litellm commit fixes gemini/gemini-2.5-pro-preview-03-25 price metadata to "output_cost_per_token": 0.00001
    • Commit 93037ea in litellm.