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Comparison · 2 models · Updated Nov 2, 2026

Claude Haiku 4.5 vs Gemini 2.5 Flash

Gemini 2.5 Flash comes out ahead, 66 to 57 on our weighted score, and it is the cheaper option too.

  1. Anthropic

    Claude Haiku 4.5

    Released Oct 15, 2025

    57/100
    • ECI142.2
    • Price$1.00 / $5.00
    • Context200K
    Full specs Remove Claude Haiku 4.5
  2. Our pick

    Google

    Gemini 2.5 Flash

    Released Jun 17, 2025

    66/100
    • ECI140.6
    • Price$0.30 / $2.50
    • Context1.05M
    Full specs Remove Gemini 2.5 Flash

  3. Add a model

    Make it a three-way comparison.

01 — Verdict

Gemini 2.5 Flash is our pick

Gemini 2.5 Flash is the better all-round choice, scoring 66/100 against Claude Haiku 4.5 (57). It leads on price, inputs & features and context window. Claude Haiku 4.5 wins on capability. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

  • CapabilityClaude Haiku 4.5Capabilities Index (ECI): Claude Haiku 4.5 142.2 · Gemini 2.5 Flash 140.6
  • Lowest priceGemini 2.5 FlashGemini 2.5 Flash $0.85 · Claude Haiku 4.5 $2.00 per 1M tokens (3:1 blend)
  • Longest contextGemini 2.5 FlashGemini 2.5 Flash 1,048,576 · Claude Haiku 4.5 200,000 tokens
  • Widest inputsGemini 2.5 FlashClaude Haiku 4.5: Text, Images, PDFs · Gemini 2.5 Flash: Text, Images, PDFs, Audio, Video
  • Self-hostingNo open weightsBoth are available only through APIs
How the score is built
MeasureWeightClaude Haiku 4.5Gemini 2.5 Flash
CapabilityCapabilities Index (ECI)50%6765
Price25%3451
Inputs & features15%80100
Context window10%3261
Overall100%57/10066/100
02 — Side by side

Every spec in one table

Highlighted cells lead their row. Dashes mean the data is not published.

Claude Haiku 4.5 vs Gemini 2.5 Flash specifications side by side
SpecificationClaude Haiku 4.5AnthropicGemini 2.5 FlashGoogle
Capability
Capabilities Index (ECI)142.2 (best)140.6
ECI rank#102 of 165 (best)#110 of 165
GPQA DiamondGraduate-level science questions71.2%—
OTIS Mock AIME 2024–2025Competition mathematics66.7%—
SimpleQA VerifiedShort factual questions13.2%—
Price per million tokens
Input$1.00$0.30 (best)
Output$5.00$2.50 (best)
Cached input$0.10$0.03 (best)
Blended (3:1)$2.00$0.85 (best)
Long-context rateSame rateSame rate
Price sourceOfficial Anthropic APIOfficial Google API
Limits
Context window200,000 tokens1,048,576 tokens (best)
Max output64,000 tokens65,536 tokens (best)
Inputs and features
TextYesYes
ImagesYesYes
PDFsYesYes
AudioNoYes
VideoNoYes
ReasoningYesYes
Tool callingYesYes
Structured outputYesYes
Availability
WeightsProprietaryProprietary
API model IDclaude-haiku-4-5gemini-2.5-flash
API providers48 (best)32
ReleasedOct 15, 2025Jun 17, 2025
Knowledge cutoffFeb 28, 2025Jan 2025
03 — Cost

What would a month cost?

Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.

  • Claude Haiku 4.5$20.00
  • Gemini 2.5 Flash$8.00
04 — Questions

Which should you choose?

Which is better: Claude Haiku 4.5 or Gemini 2.5 Flash?

Gemini 2.5 Flash is the better all-round choice, scoring 66/100 against Claude Haiku 4.5 (57). It leads on price, inputs & features and context window. Claude Haiku 4.5 wins on capability. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

Which is cheaper, Claude Haiku 4.5 or Gemini 2.5 Flash?

Gemini 2.5 Flash is cheaper at $0.30 input / $2.50 output per million tokens (official Google API price). Claude Haiku 4.5 costs $1.00 input / $5.00 output per million tokens (official Anthropic API price). At a typical mix of three input tokens to one output token, that is $0.85 per million tokens for Gemini 2.5 Flash versus $2.00 for Claude Haiku 4.5 (2.4× as much).

Which scores higher on benchmarks?

Claude Haiku 4.5 scores higher on the Capabilities Index (ECI): Claude Haiku 4.5 142.2 (#102 of 165) and Gemini 2.5 Flash 140.6 (#110 of 165). The confidence ranges of the top two overlap (139.4–143.9 vs 138.4–142.1), so treat the gap as small.

Which is better for coding?

There are no published SWE-bench Verified results for Claude Haiku 4.5 and Gemini 2.5 Flash yet, so there is no like-for-like coding score. On overall capability, Claude Haiku 4.5 leads, which tends to carry over to coding, but test on your own codebase. Both support tool calling for agent workflows.

Which has the bigger context window?

Gemini 2.5 Flash has the largest context window at 1,048,576 tokens, against 200,000 for Claude Haiku 4.5. Maximum output per response: Claude Haiku 4.5 up to 64,000, Gemini 2.5 Flash up to 65,536 tokens.

Which can read images, PDFs, audio or video?

Claude Haiku 4.5 accepts text, images and PDFs; Gemini 2.5 Flash accepts text, images, PDFs, audio and video. Gemini 2.5 Flash handles the widest range of inputs.

Are any of these open source?

No. Claude Haiku 4.5 and Gemini 2.5 Flash are proprietary and only available through APIs and apps.

Which is newer?

Claude Haiku 4.5 is the newest, released Oct 15, 2025. Gemini 2.5 Flash came out Jun 17, 2025. Knowledge cutoff: Claude Haiku 4.5 Feb 28, 2025, Gemini 2.5 Flash Jan 2025.

How do you decide the winner?

Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Nov 2, 2026.

05 — Keep comparing

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