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Head-to-head comparison

Granite 4.2 8B vs GPT-4 Turbo

Granite 4.2 8B (IBM Granite) and GPT-4 Turbo (OpenAI) 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 3 September 2026

As of 3 September 2026, GPT-4 Turbo holds the stronger ModelCap Index position (#174 vs #176); Granite 4.2 8B is 200× cheaper per output token ($0.15/1M vs $30.00/1M); Granite 4.2 8B offers the longer context window (131K vs 128K tokens); and Granite 4.2 8B ships open weights.

Which should you choose?

Choose Granite 4.2 8B if…

  • API cost matters — $0.15/1M output tokens against $30.00/1M, about 200× cheaper.
  • your workload is prompt-heavy — input tokens cost $0.10/1M against $10.00/1M.
  • you need the longer context window — 131K tokens against 128K.
  • you want to self-host: Granite 4.2 8B ships open weights while GPT-4 Turbo is api only.
  • Arena coding is your yardstick — 1363 against 1347.
  • AA Intelligence Index is your yardstick — 19.6 against 7.7.
  • AA Humanity's Last Exam is your yardstick — 9.7% against 3.1%.
  • you want the more recently listed model — Granite 4.2 8B was listed 31 August 2026, GPT-4 Turbo 9 April 2024.

Choose GPT-4 Turbo if…

  • you want the stronger overall ModelCap Index position — #174 against #176 (19.9 vs 19.3 points).

Granite 4.2 8B vs GPT-4 Turbo: specs, pricing and context

Specification comparison of Granite 4.2 8B and GPT-4 Turbo
FieldGranite 4.2 8BIBM GraniteGPT-4 TurboOpenAI
ModelCap Index position#176#174
Index score19.319.9
EvidenceMeasuredMeasured
Input price / 1M tokens$0.10$10.00
Output price / 1M tokens$0.15$30.00
Context window131K tokens128K tokens
Max output tokens118K4K
API providers listed11
Weight accessOpen weightsAPI only
Input modalitiesTextText, Image
First listed31 August 20269 April 2024
PublisherIBM GraniteOpenAI

Evidence: 3 public benchmark observations across 3 boards · 3 public benchmark observations across 3 boards. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: Granite 4.2 8B vs GPT-4 Turbo

Public benchmark boards where Granite 4.2 8B or GPT-4 Turbo has a published result
BoardGranite 4.2 8BGPT-4 TurboLeads
Arena codingArena (LMArena)13631342–138513471340–1354Granite 4.2 8B
AA Intelligence IndexArtificial Analysis19.6intelligence-index7.7intelligence-indexGranite 4.2 8B
AA Terminal-Bench 2.1Artificial Analysis18.4%terminal-bench-2.1—Only one result
AA Humanity's Last ExamArtificial Analysis9.7%humanitys-last-exam3.1%humanitys-last-examGranite 4.2 8B

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.

Granite 4.2 8B vs GPT-4 Turbo: common questions

Is Granite 4.2 8B better than GPT-4 Turbo?

GPT-4 Turbo ranks higher on the ModelCap Index as of 3 September 2026: #174 against #176. 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.

Is Granite 4.2 8B cheaper than GPT-4 Turbo?

Granite 4.2 8B is cheaper on output tokens: $0.15/1M against $30.00/1M. Input tokens are $0.10/1M for Granite 4.2 8B and $10.00/1M for GPT-4 Turbo. Prices are the lowest listed API offer ModelCap observed, in USD per million tokens.

Which has the bigger context window, Granite 4.2 8B or GPT-4 Turbo?

Granite 4.2 8B has the larger context window: 131K tokens against 128K.

Which is better for coding, Granite 4.2 8B or GPT-4 Turbo?

Arena coding: Granite 4.2 8B 1363, GPT-4 Turbo 1347 — Granite 4.2 8B leads.

Are Granite 4.2 8B and GPT-4 Turbo open-weight models?

Granite 4.2 8B: Open weights. GPT-4 Turbo: API only. 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 Granite 4.2 8B and GPT-4 Turbo?

ModelCap currently lists 1 API provider for Granite 4.2 8B and 1 for GPT-4 Turbo, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this Granite 4.2 8B vs GPT-4 Turbo comparison?

Every figure comes from the sealed ModelCap dataset published 3 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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