LLM·Dex
Newsletter

Gemini 3 Flash vs Jamba 1.5 Mini

A complete head-to-head: pricing, context window, benchmarks, modality coverage, and openness, with a programmatic verdict synthesized from the underlying data.

Updated

Gemini 3 Flash specs · Jamba 1.5 Mini specs
Verdict by category
  • PriceJamba 1.5 Mini

    Jamba 1.5 Mini publishes pricing ($0.40 / 1M output tokens) while Gemini 3 Flash does not.

  • Context windowGemini 3 Flash

    Gemini 3 Flash accepts 1.0M tokens vs 256K, 4.1× the room for long documents and codebases.

  • BenchmarksTie

    No directly comparable public benchmarks are available for both models, check the spec sheets for individual scores.

  • ModalitiesGemini 3 Flash

    Gemini 3 Flash supports 4 modalities (text, vision, audio, video) vs 1 for Jamba 1.5 Mini.

  • OpennessJamba 1.5 Mini

    Jamba 1.5 Mini ships open weights (Jamba Open Model License); Gemini 3 Flash is API-only.

It's a genuine coin-flip between Gemini 3 Flash and Jamba 1.5 Mini: 2 category wins each, with the rest tied. Jamba 1.5 Mini publishes pricing ($0.40 / 1M output tokens) while Gemini 3 Flash does not. Gemini 3 Flash accepts 1.0M tokens vs 256K, 4.1× the room for long documents and codebases.

No directly comparable public benchmarks are available for both models, check the spec sheets for individual scores. They differ in modality coverage, Gemini 3 Flash handles text, vision, audio, video while Jamba 1.5 Mini handles text, which can be the deciding factor before you even look at benchmarks. Jamba 1.5 Mini ships open weights (Jamba Open Model License); Gemini 3 Flash is API-only.

Gemini 3 Flash is the newer of the two, released 16 months after Jamba 1.5 Mini, which usually means a more recent knowledge cutoff and updated safety post-training. Gemini 3 Flash is usually picked for rag and summarization workloads, while Jamba 1.5 Mini sees more deployments in long context and summarization. If pricing matters more than every last benchmark point, run the numbers in the calculator below before committing.

Side-by-side specs

SpecGemini 3 FlashJamba 1.5 Mini
ProviderGoogleAI21
ReleasedDec 2025Aug 2024
Modalitiestext, vision, audio, videotext
Context window1.0M tokens256K tokens
Max output65.5K tokens,
Input · 1MPricing not published$0.20 / 1M tokens
Output · 1MPricing not published$0.40 / 1M tokens
Knowledge cutoff2025-01,
Open weightsNoYes (Jamba Open Model License)
API availableYesYes

Pricing at scale

What you'd actually pay at typical workloads. Numbers come from each model's published per-million-token rates.

  • Light usage, 100k in / 50k out per day, vs $1.20
  • Heavy usage, 1M in / 500k out per day, vs $12.00
  • RAG workload, 5M in / 200k out per day, vs $32.40

Light usage, 100k in / 50k out per day: pricing not directly comparable (one or both models are missing public per-token rates). Heavy usage, 1M in / 500k out per day: pricing not directly comparable (one or both models are missing public per-token rates). RAG workload, 5M in / 200k out per day: pricing not directly comparable (one or both models are missing public per-token rates).

Price calculator

Estimated spend for the listed models at your usage. Numbers are derived from each model's published per-million-token rates.

  • Gemini 3 FlashPricing unavailable
  • Jamba 1.5 Mini$0.040

Benchmarks compared

Only sourced numbers. Where a benchmark is missing for one model we show the available value rather than fabricating the other.

Benchmark scores not yet available. We only publish numbers we can source from official model cards or independent leaderboards, see methodology.
Pick Gemini 3 Flash if

Gemini 3 Flash fits when…

  • 1M-token context at mid-tier price
  • Very fast, good for interactive UX
  • Strong vision support
  • Long-context tasks, handles 1.0M tokens vs 256K for Jamba 1.5 Mini.
  • Multimodal needs covering vision, audio, video.
Pick Jamba 1.5 Mini if

Jamba 1.5 Mini fits when…

  • 256k context at small-model price
  • Hybrid SSM-Transformer is efficient on long inputs
  • Open weights for self-hosting
  • Self-hosting and on-prem requirements, open weights (Jamba Open Model License).
Don't want either?

Consider Gemini 3 Pro

Google's late-2025 flagship, set new benchmarks on long-context, vision, and reasoning at competitive pricing.

See Gemini 3 Pro specsGemini 3 Flash vs Gemini 3 ProJamba 1.5 Mini vs Gemini 3 Pro

Frequently asked

  • Is Gemini 3 Flash or Jamba 1.5 Mini cheaper?
    Per-token pricing isn't published for at least one of these models, check each model's spec page for current rates.
  • Which has the larger context window?
    Gemini 3 Flash accepts 1.0M tokens vs 256K for Jamba 1.5 Mini.
  • Is Gemini 3 Flash or Jamba 1.5 Mini better for coding?
    Both Gemini 3 Flash and Jamba 1.5 Mini are competitive on coding benchmarks. See each model's individual spec page for HumanEval and SWE-bench scores where published. For an opinionated pick, consult our Best LLM for Coding ranking.
  • Are either of these models open source?
    Jamba 1.5 Mini ships open weights (Jamba Open Model License). Gemini 3 Flash is API-only.
  • When were Gemini 3 Flash and Jamba 1.5 Mini released?
    Gemini 3 Flash was released by Google on 2025-12-09. Jamba 1.5 Mini was released by AI21 on 2024-08-22.
Friday digest

The week's AI launches, in your inbox.

One short email every Friday, new models, leaks, and quietly-shipped APIs you missed.