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ModelCap

Head-to-head comparison

o3 vs Laguna M.1

o3 (OpenAI) and Laguna M.1 (Poolside) compared on the ModelCap Index, API price, context window, provider availability, weight access and every public benchmark board they share. Figures are the same ones shown on the live rankings; nothing here is a hidden score.

Snapshot as of 9 September 2026

As of 9 September 2026, o3 holds the stronger ModelCap Index position (#46 vs #50); and Laguna M.1 ships open weights.

Which should you choose?

Choose o3 if…

  • you want the stronger overall ModelCap Index position — #46 against #50 (61.0 vs 58.4 points).
  • you want provider choice — 1 listed API providers against 0.

Choose Laguna M.1 if…

  • you want to self-host: Laguna M.1 ships open weights while o3 is api only.
  • you want the more recently listed model — Laguna M.1 was listed 15 June 2026, o3 16 April 2025.

o3 vs Laguna M.1: specs, pricing and context

Specification comparison of o3 and Laguna M.1
Fieldo3OpenAILaguna M.1Poolside
ModelCap Index position#46#50
Index score61.058.4
EvidenceMeasuredEstimated
Input price / 1M tokens$2.00Unlisted
Output price / 1M tokens$8.00Unlisted
Context window200K tokens— tokens
Max output tokens100K—
API providers listed10
Weight accessAPI onlyOpen weights
Input modalitiesImage, Text, FileText
First listed16 April 202515 June 2026
PublisherOpenAIPoolside

Evidence: 3 public benchmark observations across 3 boards · 3 reported rows against measured corpus ladders (55%); global-corpus-prior over 182 held-out anchors (45%); shrunk 4.3 toward the measured corpus. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: o3 vs Laguna M.1

Public benchmark boards where o3 or Laguna M.1 has a published result
Boardo3Laguna M.1Leads
Arena codingArena (LMArena)14601454–1466—Only one result
ARC-AGI-2ARC Prize Foundation6.5%High—Only one result
SWE-benchSWE-bench (Princeton / SWE-agent team)58.4%—Only one result
BFCL V4UC Berkeley (Gorilla)63.1Prompt—Only one result
AA τ²-Bench TelecomArtificial Analysis80.7%tau2:telecom:dual-control:pass-at-1:3-repeats:source-model="o3":reasoning=true—Only one result
AA Humanity's Last ExamArtificial Analysis20.1%hle:may-2025:text-only-2158:no-tools:pass-at-1:source-model="o3":reasoning=true—Only one result

Scores are the sources' own published figures for each model's best evaluated configuration; ModelCap never re-runs a benchmark.

Want a different pairing? Open the interactive comparison tool to swap either model for any current ranked language model.

o3 vs Laguna M.1: common questions

Is o3 better than Laguna M.1?

o3 ranks higher on the ModelCap Index as of 9 September 2026: #46 against #50. That is a capability ranking built from public benchmark evidence with published uncertainty; whether it is "better" for you also depends on price, context and where you can run it. Their published uncertainty intervals overlap, so the rank difference alone does not establish a reliable capability advantage for your workload.

Is o3 cheaper than Laguna M.1?

At least one of the two has no listed API price on ModelCap right now, so no price comparison is made.

Which has the bigger context window, o3 or Laguna M.1?

Both publish a 200K-token context window.

Which is better for coding, o3 or Laguna M.1?

The two models do not share a coding benchmark board on ModelCap yet, so no head-to-head coding score is published; the ModelCap Index position is the closest overall signal.

Are o3 and Laguna M.1 open-weight models?

o3: API only. Laguna M.1: Open weights. Open weights mean the checkpoint can be downloaded and self-hosted under its licence; API-only models are available solely through hosted endpoints.

Where can I run o3 and Laguna M.1?

ModelCap currently lists 1 API provider for o3 and 0 for Laguna M.1, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this o3 vs Laguna M.1 comparison?

Every figure comes from the sealed ModelCap dataset published 9 September 2026; the page re-renders within a minute of each data refresh, and the ModelCap Index positions are the same ones shown on the live rankings.

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